This document provides a comprehensive list of important derivations for the CBSE Class 12 Physics exam, organized chapter-wise for easy reference. It covers key topics such as electric charges, current electricity, magnetism, electromagnetic induction, optics, and modern physics. Notably, some chapters do not contain any derivations.
This document provides a comprehensive list of important derivations for the CBSE Class 12 Physics exam, organized chapter-wise for easy reference. It covers key topics such as electric charges, current electricity, magnetism, electromagnetic induction, optics, and modern physics. Notably, some chapters do not contain any derivations.
This document provides a comprehensive list of important derivations for the CBSE Class 12 Physics exam, organized chapter-wise for easy reference. It covers key topics such as electric charges, current electricity, magnetism, electromagnetic induction, optics, and modern physics. Notably, some chapters do not contain any derivations.
This document provides a comprehensive list of important derivations for the CBSE Class 12 Physics exam, organized chapter-wise for easy reference. It covers key topics such as electric charges, current electricity, magnetism, electromagnetic induction, optics, and modern physics. Notably, some chapters do not contain any derivations.
Important: This document contains a curated list of all important derivations for the CBSE Class 12 Physics exam. Each derivation is organized chapter-wise for easy reference.
1. Electric Charges and Fields
1. Coulomb’s Law: Force between two point charges.
2. Electric Field due to a Point Charge: Expression for electric field intensity.
3. Electric Field due to an Electric Dipole:
• Along the axial line.
• Along the equatorial line.
4. Torque on an Electric Dipole in a Uniform Electric Field.
5. Gauss’s Law Applications:
• Electric field due to a uniformly charged infinite plane sheet.
• Electric field due to a uniformly charged thin spherical shell (inside and outside). • Electric field due to a long straight charged wire.
2. Electrostatic Potential and Capacitance
1. Electric Potential due to a Point Charge.
2. Potential Energy of a System of Two Point Charges.
3. Electric Potential due to an Electric Dipole.
4. Capacitance of a Parallel Plate Capacitor:
• Without dielectric medium.
• With dielectric medium.
1 CBSE Class 12 Physics Derivations 2
5. Energy Stored in a Capacitor: U = 12 CV 2 .
6. Effect of Dielectric on Capacitance.
3. Current Electricity 1. Drift Velocity and Ohm’s Law.
2. Combination of Resistors:
• Equivalent resistance in series.
• Equivalent resistance in parallel.
3. Wheatstone Bridge: Condition for balance.
4. Meter Bridge: Principle and working.
5. Potentiometer:
• Comparison of emfs of two cells.
• Internal resistance of a cell.
4. Moving Charges and Magnetism
1. Biot-Savart Law: Magnetic field due to a current-carrying conductor.
2. Ampere’s Circuital Law:
• Magnetic field inside a solenoid.
• Magnetic field inside a toroid.
3. Magnetic Field due to a Current-Carrying Circular Loop:
• At the center. • On the axis.
4. Force Between Two Parallel Current-Carrying Conductors.
5. Torque on a Current Loop in a Uniform Magnetic Field.
6. Force on a Moving Charge in a Magnetic Field: F = qvB sin θ.
5. Magnetism and Matter
Important: No derivations in this chapter. CBSE Class 12 Physics Derivations 3
6. Electromagnetic Induction 1. Faraday’s Laws of Electromagnetic Induction.
2. Lenz’s Law: Direction of induced current.
3. Self-Inductance: Derivation for a solenoid.
4. Mutual Inductance: Between two coils.
5. Energy Stored in an Inductor: U = 12 LI 2 .
7. Alternating Current 1. Impedance of a Series LCR Circuit.
2. Resonance in LCR Circuit: Condition and resonant frequency.
3. Power in an AC Circuit.
4. Transformer: Relationship between primary and secondary voltages.
8. Electromagnetic Waves Important: No derivations in this chapter.
9. Ray Optics and Optical Instruments
1. Mirror Formula: For concave and convex mirrors.
2. Refraction at Spherical Surfaces.
3. Lens Maker’s Formula.
4. Combination of Thin Lenses in Contact.
5. Refraction Through a Prism: Angle of deviation and minimum deviation condition.
