Physics Derivations
Top 7 Class 12 Physics Derivations Guaranteed to Appear in Board Exams
Gauss Law, Lens Maker’s Formula, Biot-Savart, and AC Generator derivations that carry up to 25 marks in the final theory paper.
E2FE Faculty · 5 min read · Class 12 Boards
In the 70-mark Class 12 Physics theory paper, derivations account for nearly 20 to 25 marks. Here are the 7 non-negotiable derivations every student must master.
- Electric Field due to an Infinitely Long Straight Wire (Gauss Law application)
- Capacitance of a Parallel Plate Capacitor with and without a Dielectric Slab
- Lens Maker's Formula for a thin convex lens
- Magnetic Field on the Axis of a Circular Current Loop (Biot-Savart Law)
- Mutual Inductance between two long co-axial solenoids
- Derivation of Lens Equation and Refraction through a Triangular Prism
- Photoelectric Equation explanation using Einstein’s photon theory
Always accompany each derivation with a clean, labeled diagram using a sharp pencil and mention initial assumptions clearly.