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Class 12 Physics (India)

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Learn, practice, and master the skills on Khan Academy that are required for your 12th board exams.

Unit 1: Electric charges and field

Electric charge: Electric charges and fieldConservation of charge: Electric charges and fieldCoulomb's law and electric force: Electric charges and fieldElectric field & field lines: Electric charges and fieldElectric field due to point charges: Electric charges and field
Electric dipoles: Electric charges and fieldTorque on a dipole in external field: Electric charges and fieldContinuous charge distribution: Electric charges and fieldElectric flux and Gauss's law: Electric charges and fieldGauss's law: Electric charges and fieldApplication of Gauss law: Electric charges and field

Unit 2: Electrostatic potential and capacitance

Electrostatic potential, potential energy, and work done: Electrostatic potential and capacitanceElectric potential conceptual problems: Electrostatic potential and capacitancePotential due to a point charge: Electrostatic potential and capacitancePotential energy of a system of charges: Electrostatic potential and capacitancePotential due to an electric dipole and other systems of charges: Electrostatic potential and capacitanceEquipotential surfaces: Electrostatic potential and capacitance
Relation between field & potential: Electrostatic potential and capacitanceElectrostatics of conductors: Electrostatic potential and capacitanceCapacitance & parallel plate capacitors: Electrostatic potential and capacitanceEffect of dielectric on capacitance: Electrostatic potential and capacitanceCombination of capacitors: Electrostatic potential and capacitanceEnergy stored in a capacitor: Electrostatic potential and capacitanceMiscellaneous questions on Capacitance: Electrostatic potential and capacitance

Unit 3: Current electricity

Drift of electrons & the origin of resistance: Current electricityElectric current and voltage: Current electricityResistivity, and Ohm's law: Current electricityElectric power and DC circuits: Current electricityCell, EMF, terminal voltage, & internal resistance: Current electricityCombination of cells: Current electricity
Kirchhoff's junction rule: Current electricityKirchhoff's loop rule : Current electricitySeries and parallel resistors: Current electricityDC Circuit analysis: Current electricityWheatstone bridge: Current electricityPotentiometers: Current electricity

Unit 4: Moving charges and magnetism

Magnets and magnetic fields: Moving charges and magnetismOersted's experiment and right hand rule: Moving charges and magnetismLorentz force & definition of magnetic field: Moving charges and magnetismMagnetic force on a current carrying conductor: Moving charges and magnetismMotion in magnetic field: Moving charges and magnetismMotion in combined magnetic and electric fields: Moving charges and magnetismBiot - Savart law: Magnetic field due to a current element: Moving charges and magnetism
Magnetic field on the axis of circular current loop: Moving charges and magnetismAmpere's circuital law: Moving charges and magnetismForce between two parallel currents: Moving charges and magnetismSolenoid & torroid: Moving charges and magnetismCurrent loops as magnetic dipoles: Moving charges and magnetismTorque on magnetic dipoles: Moving charges and magnetismMoving coil galvanometer: Moving charges and magnetismConverting galvanometer into ammeter/voltmeter: Moving charges and magnetism

Unit 5: Magnetism & matter

Earth's magnetic field & magnetic elements: Magnetism & matterMagnetic properties of materials: Magnetism & matterPermanent magnets & electromagnets: Magnetism & matter

Unit 6: Electromagnetic induction

Electromagnetic induction - intro: Electromagnetic inductionMagnetic flux: Electromagnetic inductionFaraday's laws of induction: Electromagnetic inductionLenz's law: Electromagnetic induction
Motional EMF: Electromagnetic inductionEddy currents: Electromagnetic inductionSelf inductance: Electromagnetic inductionMutual inductance: Electromagnetic inductionAC generator: Electromagnetic induction

Unit 7: Alternating current

AC voltage applied to resistor, capacitor, & inductor: Alternating currentInductive and capacitive reactances: Alternating currentRMS values of current & voltage: Alternating currentPhasor diagrams: Alternating current
LCR series circuit (basics): Alternating currentLCR series circuit (resonance): Alternating currentPower & power factor in LCR circuits: Alternating currentTransformers: Alternating current

Unit 8: Electromagnetic waves

Displacement current: Electromagnetic wavesElectromagnetic waves & electromagnetic spectrum: Electromagnetic waves

Unit 9: Ray optics and optical instruments

Reflection and plane mirrors: Ray optics and optical instrumentsReflection of light by spherical mirrors: Ray optics and optical instrumentsRefraction at plane surfaces: Ray optics and optical instrumentsRefraction in prisms: Ray optics and optical instruments
Refraction at curved surfaces: Ray optics and optical instrumentsRefraction in thin lenses: Ray optics and optical instrumentsSome natural phenomena: Ray optics and optical instrumentsOptic instruments: telescopes and microscopes: Ray optics and optical instruments

Unit 10: Wave optics

Huygen's principle: Wave opticsHuygen's principles & proof of laws of reflection/refraction: Wave opticsCondition for construction & destruction of coherent waves: Wave opticsYoung's double slit experiment: Wave optics
Modified Young's double slit experiment: Wave opticsIntensity of light in Y.D.S.E.: Wave opticsDiffraction due to single slit: Wave opticsPolarisation & doppler effect: Wave optics

Unit 11: Dual nature of radiation and matter

Photoelectric effect and wave theory of light: Dual nature of radiation and matterThe Photon Picture: Dual nature of radiation and matterEinstein's Photoelectric Equation: Dual nature of radiation and matter
Experimental Study of Photoelectric Effect: Dual nature of radiation and matterMatter waves: Dual nature of radiation and matter

Unit 12: Atoms

History of atomic structure: AtomsAtoms and electrons: Atoms

Unit 13: Nuclei

Nuclear physics: NucleiLogarithms: NucleiHalf life and decay rate: Nuclei

Unit 14: Semiconductors

Band theory of solids: SemiconductorsBasics of semiconductors: SemiconductorsThe PN junction: SemiconductorsPN junction biasing: SemiconductorsRectifiers: Semiconductors
Zener diode: SemiconductorsOptoelectronic devices: SemiconductorsTransistors working: SemiconductorsTransistor characteristics: SemiconductorsTransistor as a device: Semiconductors
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