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Class 12 Physics Key Concepts (CBSE) — Theory, Numericals & Board Prep

Key concepts from the NCERT chapters explained with solved numericals, derivation tips and board-style practice

Ghosla Academy · School Academics Team

This course condenses the current rationalised NCERT Class 12 Physics syllabus into focused lessons, one unit at a time: electrostatics, current electricity, magnetism and EMI, optics, modern physics and semiconductors. Each lesson explains the core idea, lists the formulas that matter, and solves a board-level numerical step by step with units and correct significant reasoning. Section quizzes check your understanding as you go. Two projects make you build your own formula sheet with practice problems and attempt a full board-style mock with a derivation and diagram checklist. Explanations are in clear English with a little Hinglish, like a good school teacher would talk.

What you will be able to do

  • Apply Coulomb's law, Gauss's law and capacitor formulas to board-level numericals
  • Solve circuit problems using Ohm's law, internal resistance, Kirchhoff's rules and the Wheatstone bridge
  • Calculate magnetic fields, forces on charges, induced emf and AC quantities
  • Use mirror, lens and Snell's law formulas with correct sign convention, and work out YDSE fringe width
  • Solve photoelectric, de Broglie, Bohr-model and binding-energy questions
  • Explain p-n junction diodes and rectifiers with neat labelled diagrams

What you build

  • Chapter-wise formula sheet with a 15-numerical practice set
  • Board-style mock paper with derivation and diagram checklist

What you need to start

  • Class 12 NCERT Physics Part 1 and Part 2 (current rationalised edition)
  • Comfort with Class 11 basics: vectors, Newton's laws and simple calculus

Curriculum · 5 sections, 17 lectures

Electrostatics3 lectures
  1. Electric Charges and Fields: Coulomb's Law and Field LinesFree preview15 min
  2. Gauss's Law, Potential and CapacitorsFree preview16 min
  3. Quiz: Electrostatics7 min
Current Electricity3 lectures
  1. Ohm's Law, Drift Velocity, Resistivity and Kirchhoff's Rules16 min
  2. Wheatstone Bridge and Combinations of Resistors and Cells11 min
  3. Quiz: Current Electricity6 min
Magnetism, EMI and Alternating Current4 lectures
  1. Moving Charges and Magnetism15 min
  2. Electromagnetic Induction and Alternating Current16 min
  3. Project: Formula Sheet and 15-Numerical Practice Set20 min
  4. Quiz: Magnetism, EMI and AC7 min
Electromagnetic Waves and Optics3 lectures
  1. Ray Optics: Mirrors, Lenses, Refraction and Optical Instruments16 min
  2. Wave Optics and Electromagnetic Waves12 min
  3. Quiz: EM Waves and Optics7 min
Modern Physics and Semiconductors4 lectures
  1. Dual Nature, Atoms and Nuclei16 min
  2. Semiconductor Electronics: p-n Junction and Rectifiers11 min
  3. Project: Board-Style Mock with Derivation and Diagram Checklist20 min
  4. Quiz: Modern Physics and Semiconductors7 min

Who this is for

  • CBSE Class 12 science students preparing for the Physics board exam
  • Students who understand theory but get stuck in numericals
  • Tutors who want a compact, chapter-wise revision structure