Physics - KhanAcademy

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General

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Select section 1. Rotational Dynamics

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1. Rotational Dynamics
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  Characteristics of Circular Motion
  
  Select activity Angular velocity and speed
  
  
  
  Angular velocity and speed Lesson
  
  Students must
  
  Mark as done
  
  Select activity Centripetal force
  
  
  
  Centripetal force Lesson
  
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  Select activity Visual understanding of centripetal acceleration formula
  
  
  
  Visual understanding of centripetal acceleration formula Lesson
  
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  Select activity Centrifugal force | Pseudo force and Non-inertial frames of reference
  
  
  
  Centrifugal force | Pseudo force and Non-inertial frames of reference Lesson
  
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  Select activity Distance or arc length from angular displacement
  
  
  
  Distance or arc length from angular displacement Lesson
  
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  Select activity Deriving formula for centripetal acceleration from angular velocity
  
  
  
  Deriving formula for centripetal acceleration from angular velocity Lesson
  
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  Select activity Calculus proof of centripetal acceleration formula
  
  
  
  Calculus proof of centripetal acceleration formula Lesson
  
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  Select activity How to solve a projectile motion problem?
  
  
  
  How to solve a projectile motion problem? Lesson
  
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  Select activity Worked ex: Vector magnitude and direction
  
  
  
  Worked ex: Vector magnitude and direction Lesson
  
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  Select activity Radius comparison from velocity and angular velocity: Worked example
  
  
  
  Radius comparison from velocity and angular velocity: Worked example Lesson
  
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  Select activity Linear velocity comparison from radius and angular velocity: Worked example
  
  
  
  Linear velocity comparison from radius and angular velocity: Worked example Lesson
  
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  Select activity Change in period and frequency from change in angular velocity: Worked examples
  
  
  
  Change in period and frequency from change in angular velocity: Worked examples Lesson
  
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  Circular Motion
  
  Select activity Introduction to centripetal force
  
  Introduction to centripetal force Lesson
  
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  Applications of Uniform Circular Motion
  
  Select activity Is centripetal force a new type of force?
  
  
  
  Is centripetal force a new type of force? Lesson
  
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  Select activity Identifying centripetal force for ball on string
  
  
  
  Identifying centripetal force for ball on string Lesson
  
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  Select activity Identifying centripetal force for cars and satellites
  
  
  
  Identifying centripetal force for cars and satellites Lesson
  
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  Select activity Centripetal force problem solving
  
  
  
  Centripetal force problem solving Lesson
  
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  Select activity Mass swinging in a horizontal circle
  
  
  
  Mass swinging in a horizontal circle Lesson
  
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  Vertical Circular Motion
  
  Select activity Yo-yo in vertical circle example
  
  Yo-yo in vertical circle example Lesson
  
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  Select activity Bowling ball in vertical loop
  
  Bowling ball in vertical loop Lesson
  
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  Moment of Inertia
  
  Select activity Rotational kinetic energy
  
  
  
  Rotational kinetic energy Lesson
  
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  Select activity Rotational version of Newton's second law
  
  
  
  Rotational version of Newton's second law Lesson
  
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  Select activity More on moment of inertia
  
  
  
  More on moment of inertia Lesson
  
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  Radius of Gyration
  
  Select activity Radius of Gyration
  
  Radius of Gyration Lesson
  
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  Angular Momentum or Moment of Linear Momentum
  
  Select activity Ball hits rod angular momentum example
  
  Ball hits rod angular momentum example Lesson
  
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  Select activity Worked example: Angular impulse
  
  Worked example: Angular impulse Lesson
  
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  Expression for Torque in Terms of Moment of Inertia
  
  Select activity Moments (part 2)
  
  
  
  Moments (part 2) Lesson
  
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  Select activity Finding torque for angled forces
  
  
  
  Finding torque for angled forces Lesson
  
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  Select activity Constant angular momentum when no net torque
  
  
  
  Constant angular momentum when no net torque Lesson
  
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  Select activity Worked example: Torque and angular acc.
  
  
  
  Worked example: Torque and angular acc. Lesson
  
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  Conservation of Angular Momentum
  
  Select activity Conservation of angular momentum
  
  Conservation of angular momentum Lesson
  
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  Rolling Motion
  
  Select activity Rolling without slipping problems
  
  Rolling without slipping problems Lesson
  
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  Select activity Worked example: Conservation of angular momentum
  
  Worked example: Conservation of angular momentum Lesson
  
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Select section 2. Mechanical Properties of Fluids

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2. Mechanical Properties of Fluids
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  Pressure
  
  Select activity Pressure and Pascal's principle (part 1)
  
  
  
  Pressure and Pascal's principle (part 1) Lesson
  
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  Select activity Pressure and Pascal's principle (part 2)
  
  
  
  Pressure and Pascal's principle (part 2) Lesson
  
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  Select activity Pressure at a depth in a fluid
  
  
  
  Pressure at a depth in a fluid Lesson
  
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  Select activity Finding height of fluid in a barometer
  
  
  
  Finding height of fluid in a barometer Lesson
  
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  Select activity Archimedes principle and buoyant force
  
  
  
  Archimedes principle and buoyant force Lesson
  
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  Select activity Buoyant force example problems
  
  
  
  Buoyant force example problems Lesson
  
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  Select activity Worked example: Pressure due to fluid
  
  
  
  Worked example: Pressure due to fluid Lesson
  
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  Select activity Worked example: Excess pressure in a drop
  
  
  
  Worked example: Excess pressure in a drop Lesson
  
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  Surface Tension
  
  Select activity Surface Tension and Adhesion
  
  
  
  Surface Tension and Adhesion Lesson
  
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  Select activity Specific gravity
  
  
  
  Specific gravity Lesson
  
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  Select activity Capillary action and why we see a meniscus
  
  
  
  Capillary action and why we see a meniscus Lesson
  
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  Select activity Surface tension
  
  
  
  Surface tension Lesson
  
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  Select activity Worked example: Surface tension and energy
  
  
  
  Worked example: Surface tension and energy Lesson
  
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  Equation of Continuity
  
  Select activity Volume flow rate and equation of continuity
  
  Volume flow rate and equation of continuity Lesson
  
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  Select activity Worked example: Continuity equation
  
  Worked example: Continuity equation Lesson
  
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  Critical Velocity and Reynolds number
  
  Select activity Viscosity and Poiseuille flow
  
  Viscosity and Poiseuille flow Lesson
  
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  Select activity Turbulence at high velocities and Reynold's number
  
  Turbulence at high velocities and Reynold's number Lesson
  
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  Bernoulli's Equation
  
  Select activity Bernoulli's equation (part 1)
  
  
  
  Bernoulli's equation (part 1) Lesson
  
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  Select activity Bernoulli's equation (part 2)
  
  
  
  Bernoulli's equation (part 2) Lesson
  
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  Select activity Bernoulli's equation (part 3)
  
  
  
  Bernoulli's equation (part 3) Lesson
  
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  Select activity Bernoulli's equation (part 4)
  
  
  
  Bernoulli's equation (part 4) Lesson
  
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  Select activity Bernoulli's example problem
  
  
  
  Bernoulli's example problem Lesson
  
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  Select activity Venturi effect and Pitot tubes
  
  
  
  Venturi effect and Pitot tubes Lesson
  
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Select section 3. Kinetic Theory of Gases and Radiation

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3. Kinetic Theory of Gases and Radiation
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  Introduction
  
  Select activity Ideal gas equation: PV = nRT
  
  
  
  Ideal gas equation: PV = nRT Lesson
  
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  Select activity Boyle's law
  
  
  
  Boyle's law Lesson
  
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  Select activity Charles's law
  
  
  
  Charles's law Lesson
  
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  Select activity Avogadro's law
  
  
  
  Avogadro's law Lesson
  
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  Pressure of Ideal Gas
  
  Select activity Introduction to partial pressure
  
  Introduction to partial pressure Lesson
  
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  Select activity Partial pressure example
  
  Partial pressure example Lesson
  
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  Ideal Gas and Real Gas
  
  Select activity Kinetic molecular theory of gases
  
  Kinetic molecular theory of gases Lesson
  
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  Select activity Ideal gas equation example 2
  
  Ideal gas equation example 2 Lesson
  
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  Interpretation of Temperature in Kinetic Theory
  
  Select activity The Maxwell–Boltzmann distribution
  
  The Maxwell–Boltzmann distribution Lesson
  
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  Kinetic Theory of an Ideal Gas
  
  Select activity Boltzmann's constant
  
  Boltzmann's constant Lesson
  
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  Select activity Worked example:RMS speed and average KE of gas molecules
  
  Worked example:RMS speed and average KE of gas molecules Lesson
  
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  Kinetic Theory of Gases and Radiation
  
  Select activity Ideal gas equation example 4
  
  Ideal gas equation example 4 Lesson
  
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  Specific Heat Capacity
  
  Select activity Heat capacity at constant volume and pressure
  
  Heat capacity at constant volume and pressure Lesson
  
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  Select activity Proof: U = (3/2)PV or U = (3/2)nRT
  
  Proof: U = (3/2)PV or U = (3/2)nRT Lesson
  
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  Perfect Blackbody
  
  Select activity Blackbody radiation
  
  Blackbody radiation Lesson
  
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  Mean Free Path
  
  Select activity Derivation of gas constants using molar volume and STP
  
  Derivation of gas constants using molar volume and STP Lesson
  
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Select section 4. Thermodynamics

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4. Thermodynamics
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  Zeroth Law of Thermodynamics
  
  Select activity Zeroth law of thermodynamics
  
  Zeroth law of thermodynamics Lesson
  
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  Heat, Internal Energy and Work
  
  Select activity More on internal energy
  
  
  
  More on internal energy Lesson
  
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  Select activity Work from expansion
  
  
  
  Work from expansion Lesson
  
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  Select activity Worked example: Internal energy
  
  
  
  Worked example: Internal energy Lesson
  
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  Select activity Example: Sign of work, heat and internal energy
  
  
  
  Example: Sign of work, heat and internal energy Lesson
  
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  Thermodynamic state variables
  
  Select activity PV-diagrams and expansion work
  
  PV-diagrams and expansion work Lesson
  
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  Select activity Worked example: Work from PV diagram
  
  Worked example: Work from PV diagram Lesson
  
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  First Law of Thermodynamics: (Work and Heat are related)
  
  Select activity First law of thermodynamics / internal energy
  
  First law of thermodynamics / internal energy Lesson
  
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  Select activity Worked example: First law of thermodynamics
  
  Worked example: First law of thermodynamics Lesson
  
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  Thermodynamic State Variables and Equation of State
  
  Select activity Macrostates and microstates
  
  Macrostates and microstates Lesson
  
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  Thermodynamic Process
  
  Select activity Quasistatic and reversible processes
  
  
  
  Quasistatic and reversible processes Lesson
  
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  Select activity Work done by isothermic process
  
  
  
  Work done by isothermic process Lesson
  
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  Select activity Second law of thermodynamics
  
  
  
  Second law of thermodynamics Lesson
  
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  Select activity Worked example: First law of thermo - Cyclic processes
  
  
  
  Worked example: First law of thermo - Cyclic processes Lesson
  
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  Carnot Cycle and Carnot Engine
  
  Select activity Carnot cycle and Carnot engine
  
  
  
  Carnot cycle and Carnot engine Lesson
  
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  Select activity Proof: Volume ratios in a carnot cycle
  
  
  
  Proof: Volume ratios in a carnot cycle Lesson
  
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  Select activity Efficiency of a Carnot engine
  
  
  
  Efficiency of a Carnot engine Lesson
  
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  Select activity Carnot efficiency 2: Reversing the cycle
  
  
  
  Carnot efficiency 2: Reversing the cycle Lesson
  
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  Select activity Carnot efficiency 3: Proving that it is the most efficient
  
  
  
  Carnot efficiency 3: Proving that it is the most efficient Lesson
  
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  Select activity Worked example: Carnot engine
  
  
  
  Worked example: Carnot engine Lesson
  
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Select section 5. Oscillations

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5. Oscillations
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  Periodic and Oscilatory Motions
  
  Select activity Definition of Amplitude and Period
  
  Definition of Amplitude and Period Lesson
  
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  Linear Simple Harmonic Motion (S.H.M.)
  
  Select activity Introduction to harmonic motion
  
  
  
  Introduction to harmonic motion Lesson
  
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  Select activity Harmonic motion part 2 (calculus)
  
  
  
  Harmonic motion part 2 (calculus) Lesson
  
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  Select activity Harmonic motion part 3 (no calculus)
  
  
  
  Harmonic motion part 3 (no calculus) Lesson
  
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  Select activity Phase constant
  
  
  
  Phase constant Lesson
  
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  Differential Equation of S.H.M
  
  Select activity Equation for simple harmonic oscillators
  
  Equation for simple harmonic oscillators Lesson
  
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  Acceleration (a), Velocity (v) and Displacement (x) of S.H.M
  
  Select activity Worked example: Find velocity from displacement time graph
  
  Worked example: Find velocity from displacement time graph Lesson
  
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  Amplitude(A), Period(T) and Frequency(n) of S.H.M.
  
  Select activity Period dependence for mass on spring
  
  
  
  Period dependence for mass on spring Lesson
  
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  Select activity Worked example: Find frequency & period from displacement-time graph
  
  
  
  Worked example: Find frequency & period from displacement-time graph Lesson
  
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  Select activity Example: Analysing graphs of spring-mass system
  
  
  
  Example: Analysing graphs of spring-mass system Lesson
  
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  Energy of a Particle Performing S.H.M
  
  Select activity Intuition about simple harmonic oscillators
  
  
  
  Intuition about simple harmonic oscillators Lesson
  
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  Select activity Energy graphs for simple harmonic motion
  
  
  
  Energy graphs for simple harmonic motion Lesson
  
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  Select activity Worked example: Energy in a Simple Harmonic Motion
  
  
  
  Worked example: Energy in a Simple Harmonic Motion Lesson
  
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  Simple Pendulum
  
  Select activity Pendulums
  
  Pendulums Lesson
  
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Select section 6. Superposition of Waves

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6. Superposition of Waves
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  Progressive Wave
  
  Select activity Introduction to waves
  
  Introduction to waves Lesson
  
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  Superposition of Waves
  
  Select activity Amplitude, period, frequency and wavelength of periodic waves
  
  
  
  Amplitude, period, frequency and wavelength of periodic waves Lesson
  
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  Select activity The equation of a wave
  
  
  
  The equation of a wave Lesson
  
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  Select activity Wave interference
  
  
  
  Wave interference Lesson
  
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  Select activity Example: Frequency and amplitude from graphs
  
  
  
  Example: Frequency and amplitude from graphs Lesson
  
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  Stationary Waves
  
  Select activity Standing waves on strings
  
  
  
  Standing waves on strings Lesson
  
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  Select activity Production of sound
  
  
  
  Production of sound Lesson
  
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  Select activity Sound Properties (Amplitude, Period, Frequency, Wavelength)
  
  
  
  Sound Properties (Amplitude, Period, Frequency, Wavelength) Lesson
  
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  Harmonics and Overtones
  
  Select activity Standing waves in open tubes
  
  Standing waves in open tubes Lesson
  
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  Select activity Standing waves in closed tubes
  
  Standing waves in closed tubes Lesson
  
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  Beats
  
  Select activity Speed of Sound
  
  
  
  Speed of Sound Lesson
  
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  Select activity Relative speed of sound in solids, liquids, and gases
  
  
  
  Relative speed of sound in solids, liquids, and gases Lesson
  
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  Select activity Beat frequency
  
  
  
  Beat frequency Lesson
  
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  Select activity Derivation of beat frequency formula
  
  
  
  Derivation of beat frequency formula Lesson
  
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  Select activity Introduction to the doppler effect
  
  
  
  Introduction to the doppler effect Lesson
  
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  Select activity Doppler effect formula for observed frequency
  
  
  
  Doppler effect formula for observed frequency Lesson
  
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  Select activity Doppler effect formula when source is moving away
  
  
  
  Doppler effect formula when source is moving away Lesson
  
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  Select activity When the source and the wave move at the same velocity
  
  
  
  When the source and the wave move at the same velocity Lesson
  
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  Select activity Doppler effect for a moving observer
  
  
  
  Doppler effect for a moving observer Lesson
  
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  Select activity Doppler effect: reflection off a moving object
  
  
  
  Doppler effect: reflection off a moving object Lesson
  
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  Select activity Ultrasound medical imaging
  
  
  
  Ultrasound medical imaging Lesson
  
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  Characteristics of Sound
  
  Select activity Decibel Scale
  
  Decibel Scale Lesson
  
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  Select activity Why do sounds get softer?
  
  Why do sounds get softer? Lesson
  
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Select section 7. Wave Optics

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7. Wave Optics
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  Huygens’ Theory
  
  Select activity Huygen's theory of light & wavefronts
  
  
  
  Huygen's theory of light & wavefronts Lesson
  
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  Select activity Huygen's principle of secondary waves
  
  
  
  Huygen's principle of secondary waves Lesson
  
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  Select activity Angle between wavefront & rays of light
  
  
  
  Angle between wavefront & rays of light Lesson
  
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  Reflection of Light at a Plane Surface
  
  Select activity Reflection laws proof using Huygen's principle
  
  Reflection laws proof using Huygen's principle Lesson
  
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  Refraction of Light at a Plane Boundary Between Two Media
  
  Select activity Snell's laws proof using Huygen's principle
  
  Snell's laws proof using Huygen's principle Lesson
  
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  Interference
  
  Select activity Constructive and Destructive interference
  
  
  
  Constructive and Destructive interference Lesson
  
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  Select activity Young's double slit introduction
  
  
  
  Young's double slit introduction Lesson
  
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  Select activity Young's double slit equation
  
  
  
  Young's double slit equation Lesson
  
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  Select activity Young's double slit problem solving
  
  
  
  Young's double slit problem solving Lesson
  
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  Select activity Intensity in YDSE (Visual method-phasors) I =4Io cos^2(phi/2)
  
  
  
  Intensity in YDSE (Visual method-phasors) I =4Io cos^2(phi/2) Lesson
  
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  Select activity Fringe width in Young's double slit experiment
  
  
  
  Fringe width in Young's double slit experiment Lesson
  
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  Select activity Worked examples: Fringe width in double slit interference
  
  
  
  Worked examples: Fringe width in double slit interference Lesson
  
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  Select activity Worked examples: Overlapping fringes (two wavelengths)
  
  
  
  Worked examples: Overlapping fringes (two wavelengths) Lesson
  
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  Select activity Worked examples: Intensity variation in double-slit
  
  
  
  Worked examples: Intensity variation in double-slit Lesson
  
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  Select activity Worked examples: Coherence and Interference
  
  
  
  Worked examples: Coherence and Interference Lesson
  
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  Diffraction of Light
  
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  Single slit interference Lesson
  
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  More on single slit interference Lesson
  
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  Select activity Maxima in Single slit diffraction
  
  
  
  Maxima in Single slit diffraction Lesson
  
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  Select activity How do telescopes see many stars where our eyes see only one?
  
  
  
  How do telescopes see many stars where our eyes see only one? Lesson
  
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  Why do soap bubbles appear colourful? Lesson
  
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  Select activity Example: Diffraction slit width
  
  
  
  Example: Diffraction slit width Lesson
  
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  Select activity Worked example: Size and Intensity of central maximum
  
  
  
  Worked example: Size and Intensity of central maximum Lesson
  
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  Polarisation
  
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  Polarization of light, linear and circular Lesson
  
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Select section 8. Electrostatics

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8. Electrostatics
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  Application of Gauss’ Law
  
  Select activity Field due to infinite plane of charge (Gauss law application)
  
  Field due to infinite plane of charge (Gauss law application) Lesson
  
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  Electric Potential and Potential Energy
  
  Select activity Intro to electric potential
  
  
  
  Intro to electric potential Lesson
  
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  Select activity Potential difference & Negative potentials
  
  
  
  Potential difference & Negative potentials Lesson
  
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  Select activity Electric potential & work
  
  
  
  Electric potential & work Lesson
  
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  Select activity Electric pot. : Find sign of work done
  
  
  
  Electric pot. : Find sign of work done Lesson
  
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  Select activity Electric pot.: Where is potential (energy) more?
  
  
  
  Electric pot.: Where is potential (energy) more? Lesson
  
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  Electric Potential due to a Point Charge, a Dipole and a System of Charges
  
  Select activity Electric potential at a point in space
  
  
  
  Electric potential at a point in space Lesson
  
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  Select activity Electric potential charge configuration
  
  
  
  Electric potential charge configuration Lesson
  
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  Select activity Potential due to dipole (logical derivation)
  
  
  
  Potential due to dipole (logical derivation) Lesson
  
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  Select activity Dipole potential: Numerical
  
  
  
  Dipole potential: Numerical Lesson
  
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  Equipotential Surfaces
  
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  Equipotential surfaces (& why they are perpendicular to field) Lesson
  
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  Equipotential surfaces of two charges (& dipoles) Lesson
  
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  Select activity Calculate pot. difference in uniform fields
  
  
  
  Calculate pot. difference in uniform fields Lesson
  
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  Select activity Relation between electric field & potential
  
  
  
  Relation between electric field & potential Lesson
  
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  Select activity Calculating E from V(x,y,z): E = - potential gradient
  
  
  
  Calculating E from V(x,y,z): E = - potential gradient Lesson
  
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  Electrostatic Potential Energy of Two Point Charges and of a Dipole in an Electrostatic Field
  
  Select activity Electric potential energy of charges
  
  
  
  Electric potential energy of charges Lesson
  
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  Select activity Potential energy of a system of 3 charges
  
  
  
  Potential energy of a system of 3 charges Lesson
  
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  Select activity Potential energy of a system of charges: Numerical
  
  
  
  Potential energy of a system of charges: Numerical Lesson
  
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  Select activity Worked example: Electric potential and work done
  
  
  
  Worked example: Electric potential and work done Lesson
  
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  Conductors and Insulators, Free Charges and Bound Charges Inside a Conductor
  
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  Conductors and Insulators Lesson
  
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  Select activity Conductors, insulators, and semiconductors
  
  
  
  Conductors, insulators, and semiconductors Lesson
  
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  Select activity Electrostatic shielding & Faraday cage
  
  
  
  Electrostatic shielding & Faraday cage Lesson
  
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  Select activity Why charges reside on surface of conductors
  
  
  
  Why charges reside on surface of conductors Lesson
  
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  Select activity Conductor with charge inside a cavity
  
  
  
  Conductor with charge inside a cavity Lesson
  
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  Capacitors and Capacitance, Combination of Capacitors in Series and Parallel
  
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  Capacitors and capacitance Lesson
  
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  Select activity Capacitance
  
  
  
  Capacitance Lesson
  
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  Select activity Capacitors in series
  
  
  
  Capacitors in series Lesson
  
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  Select activity Capacitors in parallel
  
  
  
  Capacitors in parallel Lesson
  
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  Select activity Energy of a capacitor
  
  
  
  Energy of a capacitor Lesson
  
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  Example: Combinations of Capacitors Lesson
  
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  Capacitance of a Parallel Plate Capacitor Without and With Dielectric Medium Between the Plates
  
  Select activity Dielectrics in capacitors
  
  Dielectrics in capacitors Lesson
  
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  Select activity Capacitor with partially filled dielectric
  
  Capacitor with partially filled dielectric Lesson
  
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  Energy Stored in a Capacitor
  
  Select activity Energy stored in capacitor derivation (why it's not QV)
  
  
  
  Energy stored in capacitor derivation (why it's not QV) Lesson
  
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  Select activity Energy density in electric fields
  
  
  
  Energy density in electric fields Lesson
  
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  Select activity How do touchscreens work?
  
  
  
  How do touchscreens work? Lesson
  
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  Select activity How do Condenser Microphones work?
  
  
  
  How do Condenser Microphones work? Lesson
  
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  Select activity Why are sparks created?
  
  
  
  Why are sparks created? Lesson
  
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  Select activity The Sun shouldn't be alive, here's why!
  
  
  
  The Sun shouldn't be alive, here's why! Lesson
  
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Select section 9. Current Electricity

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9. Current Electricity
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  Kirchhoff’s Laws of Electrical Network
  
  Select activity Kirchhoff's current law
  
  
  
  Kirchhoff's current law Lesson
  
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  Select activity Kirchhoff's law application: 2-loop circuit solving
  
  
  
  Kirchhoff's law application: 2-loop circuit solving Lesson
  
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  Select activity Kirchhoff's voltage law (conceptual)
  
  
  
  Kirchhoff's voltage law (conceptual) Lesson
  
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  Wheatstone Bridge
  
  Select activity Wheatstone bridge & its logic
  
  Wheatstone bridge & its logic Lesson
  
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  Application of Wheatstone bridge
  
  Select activity Meter bridge principle (and working)
  
  Meter bridge principle (and working) Lesson
  
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  Potentiometer
  
  Select activity Potentiometer principle (logic) & working
  
  
  
  Potentiometer principle (logic) & working Lesson
  
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  Select activity Potentiometer - calculating internal resistance of a cell
  
  
  
  Potentiometer - calculating internal resistance of a cell Lesson
  
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  Select activity Cells, EMF, terminal voltage & internal resistance
  
  
  
  Cells, EMF, terminal voltage & internal resistance Lesson
  
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  Select activity Cells with internal resistances: Worked example
  
  
  
  Cells with internal resistances: Worked example Lesson
  
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  Galvanometer
  
  Select activity Current sensitivity (with numerical) of a galvanometer
  
  
  
  Current sensitivity (with numerical) of a galvanometer Lesson
  
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  Select activity Conversion of galvanometer into ammeter
  
  
  
  Conversion of galvanometer into ammeter Lesson
  
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  Select activity Conversion of galvanometer into voltmeter
  
  
  
  Conversion of galvanometer into voltmeter Lesson
  
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Select section 10. Magnetic Fields due to Electric Current

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10. Magnetic Fields due to Electric Current
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  Magnetic Force
  
  Select activity Magnetic force on a charge
  
  Magnetic force on a charge Lesson
  
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  Select activity Force on a current carrying conductor in a magnetic field
  
  Force on a current carrying conductor in a magnetic field Lesson
  
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  Cyclotron Motion
  
  Select activity Cyclotron - working principle & construction
  
  
  
  Cyclotron - working principle & construction Lesson
  
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  Select activity Cyclotron frequency
  
  
  
  Cyclotron frequency Lesson
  
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  Select activity Cyclotron energies (& effect of electric & magnetic field)
  
  
  
  Cyclotron energies (& effect of electric & magnetic field) Lesson
  
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  Select activity Radius & time period of charges moving in magnetic field
  
  
  
  Radius & time period of charges moving in magnetic field Lesson
  
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  Magnetic Force on a Wire Carrying a Current
  
  Select activity Magnetic force on a current carrying wire
  
  Magnetic force on a current carrying wire Lesson
  
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  Select activity Example: Force on a current carrying wire
  
  Example: Force on a current carrying wire Lesson
  
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  Torque on a Current Loop
  
  Select activity Torque acting on current loops
  
  Torque acting on current loops Lesson
  
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  Select activity Moving coil galvanometer working
  
  Moving coil galvanometer working Lesson
  
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  Magnetic Dipole Moment
  
  Select activity Magnetic dipoles & dipole moment
  
  Magnetic dipoles & dipole moment Lesson
  
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  Magnetic Field due to a Current : Biot-Savart Law
  
  Select activity Biot Savart law (vector form)
  
  Biot Savart law (vector form) Lesson
  
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  Force of Attraction between two Long Parallel Wires
  
  Select activity Force between two parallel current wires
  
  Force between two parallel current wires Lesson
  
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  Magnetic Field Produced by a Current in a Circular Arc of a Wire
  
  Select activity Magnetic field due to two current loops: Numerical
  
  Magnetic field due to two current loops: Numerical Lesson
  
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  Axial Magnetic Field Produced by Current in a Circular Loop
  
  Select activity Magnetic field on the axis of a circular loop
  
  Magnetic field on the axis of a circular loop Lesson
  
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  Magnetic Field Lines
  
  Select activity Magnetic field lines (& their properties)
  
  Magnetic field lines (& their properties) Lesson
  
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  Magnetic Lines for a Current Loop
  
  Select activity Right hand thumb rule (& solved numerical)
  
  Right hand thumb rule (& solved numerical) Lesson
  
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  Ampere's Law
  
  Select activity Ampere's circuital law (with examples)
  
  
  
  Ampere's circuital law (with examples) Lesson
  
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  Select activity Field due to straight wire carrying current (Outside)
  
  
  
  Field due to straight wire carrying current (Outside) Lesson
  
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  Select activity Field due to straight wire carrying current (inside)
  
  
  
  Field due to straight wire carrying current (inside) Lesson
  
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  Magnetic Field of a Solenoid and a Toroid
  
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  Magnetic fields through solenoids Lesson
  
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Select section 11. Magnetic Materials

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11. Magnetic Materials
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  Torque Acting on a Magnetic Dipole in a Uniform Magnetic Field
  
  Select activity Intro to torque on a dipole in uniform electric field
  
  Intro to torque on a dipole in uniform electric field Lesson
  
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  Select activity Torque on a dipole in electric field (derivation)
  
  Torque on a dipole in electric field (derivation) Lesson
  
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  Origin of Magnetism in Materials
  
  Select activity Magnetic moment of electron around a proton
  
  
  
  Magnetic moment of electron around a proton Lesson
  
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  Select activity Bohr magneton (& gyromagnetic ratio)
  
  
  
  Bohr magneton (& gyromagnetic ratio) Lesson
  
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  Select activity Magnetic force on a proton example (part 1)
  
  
  
  Magnetic force on a proton example (part 1) Lesson
  
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  Magnetization and Magnetic Intensity
  
  Select activity Magnetic susceptibility & permeability
  
  Magnetic susceptibility & permeability Lesson
  
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  Magnetic Properties of Materials
  
  Select activity Paramagnetism & Diamagnetism
  
  Paramagnetism & Diamagnetism Lesson
  
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  Select activity Ferromagnetism & curie temperature
  
  Ferromagnetism & curie temperature Lesson
  
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  Hysteresis
  
  Select activity Hysteresis & magnetic retention
  
  Hysteresis & magnetic retention Lesson
  
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  Permanent Magnet and Electromagnet
  
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  Coercivity & retentivity (Permanent & electromagnets) Lesson
  
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Select section 12. Electromagnetic Induction

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12. Electromagnetic Induction
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  Introduction
  
  Select activity Electromagnetic induction (& Faraday's experiments)
  
  Electromagnetic induction (& Faraday's experiments) Lesson
  
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  Faraday's Laws of Electromagnetic Induction
  
  Select activity Faraday's Law Introduction
  
  
  
  Faraday's Law Introduction Lesson
  
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  Select activity Faraday's Law, ε = − N* Δϕ/Δt
  
  
  
  Faraday's Law, ε = − N* Δϕ/Δt Lesson
  
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  Select activity Faraday's Law examples (qualitative)
  
  
  
  Faraday's Law examples (qualitative) Lesson
  
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  Select activity Faraday's Law example
  
  
  
  Faraday's Law example Lesson
  
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  Lenz's Law
  
  Select activity Lenz's Law | Magnetic forces, magnetic fields, and Faraday's law
  
  Lenz's Law | Magnetic forces, magnetic fields, and Faraday's law Lesson
  
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  Select activity Lenz's Law examples
  
  Lenz's Law examples Lesson
  
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  Magnetic Flux
  
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  Flux and magnetic flux Lesson
  
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  Motional Electromotive Force
  
  Select activity Emf induced in rod traveling through magnetic field
  
  
  
  Emf induced in rod traveling through magnetic field Lesson
  
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  Select activity Part 1 - Why is an EMF induced in a moving rod?
  
  
  
  Part 1 - Why is an EMF induced in a moving rod? Lesson
  
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  Select activity Part 2 - Why is an EMF induced in a moving rod?
  
  
  
  Part 2 - Why is an EMF induced in a moving rod? Lesson
  
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  Select activity Emf induced in a rotating rod (& disc) - Motional EMF
  
  
  
  Emf induced in a rotating rod (& disc) - Motional EMF Lesson
  
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  Induced emf in a Stationary Coil in a Changing Magnetic Field
  
  Select activity Induced Electric Fields
  
  Induced Electric Fields Lesson
  
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  Generators
  
  Select activity Right hand generator rule
  
  
  
  Right hand generator rule Lesson
  
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  Select activity Electric generator (A.C. & D.C.)
  
  
  
  Electric generator (A.C. & D.C.) Lesson
  
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  Select activity EMF & flux equation (& graph) of AC generator
  
  
  
  EMF & flux equation (& graph) of AC generator Lesson
  
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  Eddy Currents
  
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  Eddy currents & their applications (& how to reduce them) Lesson
  
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  Self-Inductance
  
  Select activity What are inductors? (self-inductance)
  
  What are inductors? (self-inductance) Lesson
  
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  Select activity Self inductance of a long solenoid
  
  Self inductance of a long solenoid Lesson
  
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  Energy Stored in a Magnetic Field
  
  Select activity Energy stored in inductor (1/2 Li^2)
  
  Energy stored in inductor (1/2 Li^2) Lesson
  
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  Energy Density of a Magnetic Field
  
  Select activity Energy density in Magnetic fields
  
  Energy density in Magnetic fields Lesson
  
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  Mutual Inductance (M)
  
  Select activity Mutual induction & inductance
  
  
  
  Mutual induction & inductance Lesson
  
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  Select activity Mutual inductance of two coaxial solenoids
  
  
  
  Mutual inductance of two coaxial solenoids Lesson
  
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  Select activity Mutual inductance of two concentric coils
  
  
  
  Mutual inductance of two concentric coils Lesson
  
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  Select activity Example: Factors affecting mutual inductance
  
  
  
  Example: Factors affecting mutual inductance Lesson
  
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  Transformer
  
  Select activity Transformers - working & applications (step up and step down)
  
  Transformers - working & applications (step up and step down) Lesson
  
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  Select activity Transformer currents & energy losses (intuition)
  
  Transformer currents & energy losses (intuition) Lesson
  
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Select section 13. AC Circuits

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13. AC Circuits
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  Average and RMS values
  
  Select activity What is RMS value? (& why should we care?)
  
  What is RMS value? (& why should we care?) Lesson
  
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  Select activity Sine wave RMS value - derivation (without calculus)
  
  Sine wave RMS value - derivation (without calculus) Lesson
  
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  Different Types of AC Circuits
  
  Select activity AC voltage applied to resistors
  
  
  
  AC voltage applied to resistors Lesson
  
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  Select activity Phasor diagram (& its applications)
  
  
  
  Phasor diagram (& its applications) Lesson
  
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  Select activity Example: Relating Phasor diagrams with equations
  
  
  
  Example: Relating Phasor diagrams with equations Lesson
  
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  Select activity AC voltage across pure inductor (derivation)
  
  
  
  AC voltage across pure inductor (derivation) Lesson
  
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  Select activity Why current lags voltage in inductors (logic)
  
  
  
  Why current lags voltage in inductors (logic) Lesson
  
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  Select activity Reactance, resistance, & impedance (what's the difference?)
  
  
  
  Reactance, resistance, & impedance (what's the difference?) Lesson
  
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  Select activity AC voltage across a capacitor (derivation)
  
  
  
  AC voltage across a capacitor (derivation) Lesson
  
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  Select activity Why current leads voltage in a capacitor (logic)
  
  
  
  Why current leads voltage in a capacitor (logic) Lesson
  
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  Select activity Worked example: Phase difference between voltage and current in AC
  
  
  
  Worked example: Phase difference between voltage and current in AC Lesson
  
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  Power in AC circuit
  
  Select activity What is power factor? (Power in AC circuits)
  
  What is power factor? (Power in AC circuits) Lesson
  
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  Electric Resonance
  
  Select activity LCR resonance & resonant frequency
  
  
  
  LCR resonance & resonant frequency Lesson
  
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  Select activity LCR frequency response & quality
  
  
  
  LCR frequency response & quality Lesson
  
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  Select activity Worked example: Voltage in a series LCR Circuit
  
  
  
  Worked example: Voltage in a series LCR Circuit Lesson
  
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  Select activity Worked example: Impedance in series LCR circuit
  
  
  
  Worked example: Impedance in series LCR circuit Lesson
  
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  Select activity Worked examples: Phase angle in a series LCR Circuit
  
  
  
  Worked examples: Phase angle in a series LCR Circuit Lesson
  
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  Select activity Worked examples: Resonance frequency in LCR circuits
  
  
  
  Worked examples: Resonance frequency in LCR circuits Lesson
  
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Select section 14. Dual Nature of Radiation and Matter

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14. Dual Nature of Radiation and Matter
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  The Photoelectric Effect
  
  Select activity Photo electric effect & failure of wave theory
  
  
  
  Photo electric effect & failure of wave theory Lesson
  
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  Select activity Experimental setup & saturation current: photoelectric effect
  
  
  
  Experimental setup & saturation current: photoelectric effect Lesson
  
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  Select activity Stopping potential & maximum kinetic energy
  
  
  
  Stopping potential & maximum kinetic energy Lesson
  
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  Select activity All photoelectric effect graphs: Effect of intensity/frequency
  
  
  
  All photoelectric effect graphs: Effect of intensity/frequency Lesson
  
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  Select activity Stopping potential vs frequency graph
  
  
  
  Stopping potential vs frequency graph Lesson
  
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  Select activity Comparing stopping potential, and max. speed: Solved example
  
  
  
  Comparing stopping potential, and max. speed: Solved example Lesson
  
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  Select activity Einsteins photoelectric equation & work function
  
  
  
  Einsteins photoelectric equation & work function Lesson
  
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  Select activity Which metals will show photoelectric emission
  
  
  
  Which metals will show photoelectric emission Lesson
  
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  Select activity Calculate threshold frequency
  
  
  
  Calculate threshold frequency Lesson
  
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  Select activity Photon Energy
  
  
  
  Photon Energy Lesson
  
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  Select activity Photoelectric effect explanation using quantum theory
  
  
  
  Photoelectric effect explanation using quantum theory Lesson
  
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  Select activity Calculate the no. of photons per second
  
  
  
  Calculate the no. of photons per second Lesson
  
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  Select activity Particle Nature of Light: The Photon
  
  
  
  Particle Nature of Light: The Photon Lesson
  
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  De Broglie Hypothesis
  
  Select activity De Broglie wavelength
  
  De Broglie wavelength Lesson
  
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  Select activity Comparing de Broglie wavelengths: Solved example
  
  Comparing de Broglie wavelengths: Solved example Lesson
  
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Select section 15. Structure of Atoms and Nuclei

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15. Structure of Atoms and Nuclei
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  Geiger-Marsden Experiment
  
  Select activity RutherfordÂ s gold foil experiment
  
  RutherfordÂ s gold foil experiment Lesson
  
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  Rutherford’s Atomic Model
  
  Select activity Drawback of the Rutherford model
  
  Drawback of the Rutherford model Lesson
  
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  Select activity Worked example: Distance of closest approach
  
  Worked example: Distance of closest approach Lesson
  
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  Atomic Spectra
  
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  Atomic spectra Lesson
  
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  Bohr’s Atomic Model
  
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  Bohr model energy levels Lesson
  
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  Select activity Absorption and emission
  
  
  
  Absorption and emission Lesson
  
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  Select activity Emission spectrum of hydrogen
  
  
  
  Emission spectrum of hydrogen Lesson
  
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  Atomic Nucleus
  
  Select activity Nuclear size and density
  
  Nuclear size and density Lesson
  
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  Nuclear Binding Energy
  
  Select activity Mass defect and binding energy
  
  Mass defect and binding energy Lesson
  
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  Select activity Binding energy graph
  
  Binding energy graph Lesson
  
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  Radioactive Decays
  
  Select activity Types of decay
  
  Types of decay Lesson
  
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  Select activity When does each type of decay occur?
  
  When does each type of decay occur? Lesson
  
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  Law of Radioactive Decay
  
  Select activity Half-life
  
  
  
  Half-life Lesson
  
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  Select activity Half-life plot
  
  
  
  Half-life plot Lesson
  
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  Select activity Introduction to exponential decay
  
  
  
  Introduction to exponential decay Lesson
  
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  Select activity Activity and Mean life
  
  
  
  Activity and Mean life Lesson
  
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  Select activity Exponential growth and decay work problems
  
  
  
  Exponential growth and decay work problems Lesson
  
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  Select activity More exponential decay examples
  
  
  
  More exponential decay examples Lesson
  
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  Select activity Exponential decay and semi-log plots
  
  
  
  Exponential decay and semi-log plots Lesson
  
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  Select activity Worked example: Half-life
  
  
  
  Worked example: Half-life Lesson
  
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  Select activity Worked example: Fraction of undecayed nuclei
  
  
  
  Worked example: Fraction of undecayed nuclei Lesson
  
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  Nuclear Energy
  
  Select activity Nuclear fission
  
  Nuclear fission Lesson
  
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  Select activity Nuclear fusion
  
  Nuclear fusion Lesson
  
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Select section 16. Semiconductor Devices

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16. Semiconductor Devices
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  Introduction
  
  Select activity Intro to semiconductors
  
  Intro to semiconductors Lesson
  
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  p-n Junction Diode as a Rectifier
  
  Select activity Half wave rectifiers
  
  Half wave rectifiers Lesson
  
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  Select activity Full wave rectifiers
  
  Full wave rectifiers Lesson
  
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  Special Purpose Junction Diodes
  
  Select activity Zener diode & Zener breakdown
  
  
  
  Zener diode & Zener breakdown Lesson
  
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  Select activity Zener diode voltage regulator
  
  
  
  Zener diode voltage regulator Lesson
  
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  Select activity PN diode characteristics
  
  
  
  PN diode characteristics Lesson
  
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  Select activity PN breakdown and avalanche
  
  
  
  PN breakdown and avalanche Lesson
  
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  Select activity Photodiodes - (working & why it's reverse biased)
  
  
  
  Photodiodes - (working & why it's reverse biased) Lesson
  
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  Select activity Solar cells - IV characteristics
  
  
  
  Solar cells - IV characteristics Lesson
  
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  Select activity Solar cells - working (and difference from photodiodes)
  
  
  
  Solar cells - working (and difference from photodiodes) Lesson
  
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  Select activity Solar cells - fabrication & material's used
  
  
  
  Solar cells - fabrication & material's used Lesson
  
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  Select activity LED working & advantages
  
  
  
  LED working & advantages Lesson
  
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  Select activity LED - color & fabrication
  
  
  
  LED - color & fabrication Lesson
  
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  Bipolar Junction Transistor (BJT)
  
  Select activity Intrinsic semiconductors
  
  
  
  Intrinsic semiconductors Lesson
  
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  Select activity Generation and recombination in semiconductors
  
  
  
  Generation and recombination in semiconductors Lesson
  
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  Select activity Extrinsic semiconductors N-type
  
  
  
  Extrinsic semiconductors N-type Lesson
  
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  Select activity Extrinsic semiconductors P-type
  
  
  
  Extrinsic semiconductors P-type Lesson
  
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  Select activity Minority charge carriers in extrinsic semiconductors
  
  
  
  Minority charge carriers in extrinsic semiconductors Lesson
  
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  Select activity Forward biasing a PN junction
  
  
  
  Forward biasing a PN junction Lesson
  
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  Select activity Reverse biasing a PN junction
  
  
  
  Reverse biasing a PN junction Lesson
  
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  Select activity Forward and reverse current mechanism
  
  
  
  Forward and reverse current mechanism Lesson
  
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  Select activity Transistor working
  
  
  
  Transistor working Lesson
  
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  Select activity Parts of a transistor
  
  
  
  Parts of a transistor Lesson
  
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  Select activity Transistor symbol
  
  
  
  Transistor symbol Lesson
  
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  Select activity Transistor current and parameters
  
  
  
  Transistor current and parameters Lesson
  
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  Select activity Input characteristics of NPN transistor
  
  
  
  Input characteristics of NPN transistor Lesson
  
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  Select activity Output characteristics of NPN transistor
  
  
  
  Output characteristics of NPN transistor Lesson
  
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  Select activity Active, saturation, & cutoff state of NPN transistor
  
  
  
  Active, saturation, & cutoff state of NPN transistor Lesson
  
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  Select activity Transistor as a voltage amplifier
  
  
  
  Transistor as a voltage amplifier Lesson
  
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  Select activity Transistor as a switch
  
  
  
  Transistor as a switch Lesson
  
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