CBSE Class 12 Physics exam will be conducted by the Central Board of Secondary Education (CBSE) on February 21, 2025. There will be 30 mandatory questions in sections A to E in five sections on the question paper in the CBSE 2024-25 sample paper. It will be a 70 marks exam and it will be conducted in three hours.
| Key Theoretical Principles | |
| 1. Electrostatics and Current Electricity | - Electric dipole, Gauss's law, and applications - Drift velocity and significance |
| 2. Electromagnetism and Electromagnetic Induction | - Moving coil galvanometer and its adaptation to a voltmeter/ammeter - Self-induction & mutual induction - LCR circuit, AC generator, transformer |
| 3. Optics | - Refraction of spherical surfaces, prism - Lens maker's formula - Compound microscope & telescope - Young's double-slit experiment, single-slit experiment |
| 4. Modern Physics | - Atomic structure (size of an atomic orbit, energy of an electron in orbit) - PN diode and rectifier |
| 5. Electromagnetic Waves and Magnetism | - Properties of magnetic materials - Properties of electromagnetic waves |
| Key Numerical and Graph-Based Concepts | |
| Numericals on: | - Electric field, capacitance, and electric circuits - Magnetic force and field calculations - Image formation in lenses - Interference fringe width |
| Graph-Based Queries on: | - Temperature dependence of resistivity - Photoelectric effect (stopping potential & intensity changes) - De Broglie wavelength, binding energy curve, and nucleon potential energy |
| Chapter-Wise Key Topics to Revise | |
| 1. Electrostatics | - Electric dipole: Field, torque, and potential - Gauss's law and its applications - Capacitors and their properties |
| 2. Current Electricity | - Drift velocity and its significance - Kirchhoff's laws and applications - Wheatstone bridge and its use in circuit analysis |
| 3. Magnetic Effects of Current & Magnetism | - Biot-Savart law and applications - Force between two conductors carrying current - Torque on a current-carrying loop in a magnetic field - Working principle of moving coil galvanometer |
How to Solve Challenging/Ambiguous Physics Problems ?
- Read the question carefully: Read the questions properly.
- Use diagrams: Practicing diagrams help you to understand better.
- List given and required values: Identify known values and whatever needs calculation.
- Apply relevant concepts: Use the right formulas for all equations.
- Check for correct units: Solve numerical problems with attention.
- For MCQs: Eliminate the incorrect answers.
- If stuck, move on: If you are not solve a question move to another and return to it later on.
