101
IMPORTANT THEORY AND DERIVATIONS
PHYSICS
CLASS 12
• There are 100 important theory and derivations for the coming examinations
• These are total topics important for the board examination
• The important topics are in bold letters.
• All the students are advised to prepare the topics by making their own short
notes
• All the chapters from Electromagnetic Induction to Semiconductor Electronics
are easy compared to other previous chapters.
All the Best
12/27/2023
Anuj Prakash Singh
, PHYSICS
Chapter 1: Electric Charges and Fields
1) Coulomb’s law of Electrostatics ( Normal Derivation & Vector Derivation)
2) Superposition Principle in Electric Field Intensity + Numericals.
3) Electric Lines of force and it’s properties.
4) Electric field intensity due to a point charge.
5) Electric field intensity due to a dipole at an axial position, at an Equatorial position and at a
general point.
6) Motion of a charged particle in an Electric Field. + Numericals.
7) Force and torque acting on a dipole in an external uniform electric field.
8) Work done to rotate a dipole in external electric uniform field + Numericals.
9) Gauss’s Law of Electrostatics, its proof for spherical symmetry.
Chapter 2: Electrostatic Potential and Capacitance
10) Electric field intensity due to a thin infinite plane sheet of charge and due to two thin infinite
plane sheets of charge.
11) Electrostatic potential due to a point charge.
12) Electrostatic Potential due to a dipole (i) at an axial position,(ii) at an Equatorial
position, and (iii) at a general point.
13) Electrostatic Potential due to Charged Spheres.
14) Equipotential Surfaces
15) Relation between electric field and Electrostatic Potential + Numericals.
16) Electrostatic Potential Energy.
17) Electrostatic Potential Energy of an Electric Dipole in a Uniform Electric Field(Stable and
Unstable Equilibrium) + Numericals.
18) Work Done in Rotating in Electric Dipole in a Uniform Electric Field.
19) Capacitance of a parallel plate capacitor with conducting slab and with dielectric slab.
20) Energy stored in a parallel plate capacitor.
21) Force on one plate of a parallel plate Capacitor due to other plate.
22) Combination of Capacitors Series and Parallel.
Chapter 3: Current Electricity
23) Ohm’s Law and its derivations
24) Drift velocity of free electrons & it’s relation with current I = v d enA.
25) Electrical Resistance
26) Effect of Temperature on Resistance/Resistivity.
27) Combination of Resistances Series and Parallel.
28) Cells, Emf, Internal resistance and Terminal Voltage.
29)Kirchhoff’s Law and simple application (definition & numerical)
30) Wheatstone Bridge
31) Meter Bridge, Ammeter, Voltmeter Principle and Working + Numericals
ANUJJ SINGH
IMPORTANT THEORY AND DERIVATIONS
PHYSICS
CLASS 12
• There are 100 important theory and derivations for the coming examinations
• These are total topics important for the board examination
• The important topics are in bold letters.
• All the students are advised to prepare the topics by making their own short
notes
• All the chapters from Electromagnetic Induction to Semiconductor Electronics
are easy compared to other previous chapters.
All the Best
12/27/2023
Anuj Prakash Singh
, PHYSICS
Chapter 1: Electric Charges and Fields
1) Coulomb’s law of Electrostatics ( Normal Derivation & Vector Derivation)
2) Superposition Principle in Electric Field Intensity + Numericals.
3) Electric Lines of force and it’s properties.
4) Electric field intensity due to a point charge.
5) Electric field intensity due to a dipole at an axial position, at an Equatorial position and at a
general point.
6) Motion of a charged particle in an Electric Field. + Numericals.
7) Force and torque acting on a dipole in an external uniform electric field.
8) Work done to rotate a dipole in external electric uniform field + Numericals.
9) Gauss’s Law of Electrostatics, its proof for spherical symmetry.
Chapter 2: Electrostatic Potential and Capacitance
10) Electric field intensity due to a thin infinite plane sheet of charge and due to two thin infinite
plane sheets of charge.
11) Electrostatic potential due to a point charge.
12) Electrostatic Potential due to a dipole (i) at an axial position,(ii) at an Equatorial
position, and (iii) at a general point.
13) Electrostatic Potential due to Charged Spheres.
14) Equipotential Surfaces
15) Relation between electric field and Electrostatic Potential + Numericals.
16) Electrostatic Potential Energy.
17) Electrostatic Potential Energy of an Electric Dipole in a Uniform Electric Field(Stable and
Unstable Equilibrium) + Numericals.
18) Work Done in Rotating in Electric Dipole in a Uniform Electric Field.
19) Capacitance of a parallel plate capacitor with conducting slab and with dielectric slab.
20) Energy stored in a parallel plate capacitor.
21) Force on one plate of a parallel plate Capacitor due to other plate.
22) Combination of Capacitors Series and Parallel.
Chapter 3: Current Electricity
23) Ohm’s Law and its derivations
24) Drift velocity of free electrons & it’s relation with current I = v d enA.
25) Electrical Resistance
26) Effect of Temperature on Resistance/Resistivity.
27) Combination of Resistances Series and Parallel.
28) Cells, Emf, Internal resistance and Terminal Voltage.
29)Kirchhoff’s Law and simple application (definition & numerical)
30) Wheatstone Bridge
31) Meter Bridge, Ammeter, Voltmeter Principle and Working + Numericals
ANUJJ SINGH
