how many derivations in physics class 12
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Answer:
Chapter 1: Electric Charges and Fields
Coulomb’s law in vector form (Agreement with Newton’s third law i.e. F12 = ‒F21).
Electric field intensity on Equatorial Line & Axial Line of an Electric Dipole.
Electric Field Intensity at various points due to a uniformly charged spherical shell (thin & thick both).
Electric filed intensity due to a thin infinite plane sheet of charge.
Application of Gauss theorem in calculation of electric field.
Chapter 2: Electrostatic Potential and Capacitance
Electric Potential due to a point charge.
Electric Potential on Axial Line & Equatorial Line of an Electric Dipole.
Capacitance of parallel plate capacitor (with or without dielectric medium).
Energy stored in a capacitor.
Chapter ‒ 3: Current Electricity
Expression for drift velocity.
Relation between current and drift velocity.
Series and parallel connection of resistors (Derivations and Numerical Problems).
Kirchhoff’s laws and simple applications (Definition and Numerical Problems).
Potentiometer (Numerical are expected this year)
Chapter – 4: Moving Charges and Magnetism
Application of Biot - Savart law (Calculation of magnetic field due to current carrying circular loop).
Ampere’s law and its applications (Magnetic field due to infinitely long straight wire; Straight and toroidal solenoids).
Force on a moving charge in uniform magnetic and electric fields (Numerical and Derication)
Cyclotron (Diagram, Theory and Derivation).
Force on a current-carrying conductor in a uniform magnetic field (Derivation and Numerical Problems).
Force between two parallel current-carrying conductors (including definition of ampere).
Torque experienced by a current loop in uniform magnetic field.
Moving coil galvanometer-its current sensitivity and conversion to ammeter and voltmeter.
Chapter ‒ 5: Magnetism and Matter
Current loop as a magnetic dipole and its magnetic dipole moment.
Magnetic dipole moment of a revolving electron.
Magnetic field intensity due to a magnetic dipole (bar magnet) along its axis and perpendicular to its axis.
Torque on a magnetic dipole (bar magnet) in a uniform magnetic field.
Properties of Para-, dia- and ferro - magnetic substances
Chapter – 6: Electromagnetic Induction
Motional EMF or Induced EMF (Derivations and Numerical Problems).
Mutual Induction and Self Induction.
Chapter – 7: Alternating Current
Relation between rms and peak value of current & emf (Numerical Problems and Derivations).
Reactance, impedance & average power in series LCR, LR, CR or LR circuit. (Numerical Problems and Derivations).
Resonance in series LCR circuit. (Numerical Problems and Derivations).
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