CBSE Class 12 Physics - 25 Theory PYQ Based MCQ Quiz with answers

JOIN FREE TEST GROUPS DIRECTLY JOINING LINKS FOR DAILY UPLOADS


JOIN WHATSAPP PAID GROUP WITH PDF FORMAT DPP WITH ANSWERS 
AUGUST TO MARCH 2027 FEES RS.2000 ONLY 
TN SAMACHEER KALVI WHATSAPP TEST GROUP LINK-
https://chat.whatsapp.com/LArpAtL2Kni3W5VQiqcATP
 
CBSE 10 11 12 WHATSAPP TEST GROUP LINK-
https://chat.whatsapp.com/J6jLJofOy0HLoepEaql7rl
 
NEET JEE WHATSAPP TEST GROUP LINK-
https://chat.whatsapp.com/BsCwUz20NuICt2TTxiBe1y


 PDF FORMAT QUESTION AND ANSWERS & STUDY MATERIALS AVAILABLE FOR SALES 
WHATSAPP – 8056206308 FOR DETAILS
12TH PHYSICS CHEMISTRY BIOLOGY CHAPTER WISE MCQS 2 3 5 MARKS QUESTION ANSWERS PDF COST RS.300 ONLY

CBSE Class 12 Physics – 25 Theory PYQ-Based MCQs

Conceptual questions based on recurring CBSE Class XII Physics previous-year question themes.

No numerical calculations — theory and concept focused.

Note: These are PYQ-based/paraphrased practice questions, not verbatim reproduction of CBSE question papers. CBSE's Class XII Physics assessment includes objective/competency-focused questions, and official Physics sample papers and marking schemes are published by CBSE.

Electrostatics

1. The electric field inside a conductor in electrostatic equilibrium is:

(A) Maximum(B) Zero(C) Infinite(D) Variable but always non-zero

Correct Answer: (B) Zero

Electrostatics

2. Electric field lines never intersect because:

(A) Electric field is always zero(B) At an intersection there would be two directions of electric field at one point(C) Charges cannot move(D) Field lines are imaginary only

Correct Answer: (B) At an intersection there would be two directions of electric field at one point

Electrostatics

3. A dielectric placed between the plates of a charged capacitor generally:

(A) Increases its capacitance(B) Decreases its capacitance to zero(C) Has no effect on capacitance(D) Destroys the electric field completely

Correct Answer: (A) Increases its capacitance

Electrostatics

4. The electric potential at every point on the surface of an equipotential conductor is:

(A) Different(B) Zero in every case(C) The same(D) Infinite

Correct Answer: (C) The same

Current Electricity

5. Drift velocity of electrons in a conductor is generally:

(A) Very large compared with the speed of light(B) Very small(C) Equal to the speed of light(D) Independent of electric field

Correct Answer: (B) Very small

Current Electricity

6. The resistance of a metallic conductor generally increases with increase in:

(A) Temperature(B) Length decrease(C) Cross-sectional area(D) Number of free electrons only

Correct Answer: (A) Temperature

Current Electricity

7. In a series combination of resistors, the quantity that remains the same through each resistor is:

(A) Potential difference(B) Current(C) Resistance(D) Power

Correct Answer: (B) Current

Moving Charges & Magnetism

8. A charged particle moving parallel to a uniform magnetic field experiences:

(A) Maximum magnetic force(B) Zero magnetic force(C) A force opposite to its velocity(D) An electric force only

Correct Answer: (B) Zero magnetic force

Moving Charges & Magnetism

9. The magnetic force on a moving charged particle is maximum when the angle between velocity and magnetic field is:

(A) 0°(B) 30°(C) 60°(D) 90°

Correct Answer: (D) 90°

Moving Charges & Magnetism

10. The magnetic field inside a long ideal solenoid is approximately:

(A) Uniform and parallel to its axis(B) Zero everywhere(C) Radially outward only(D) Randomly directed

Correct Answer: (A) Uniform and parallel to its axis

Electromagnetic Induction

11. Lenz's law is consistent with the law of conservation of:

(A) Charge(B) Mass(C) Energy(D) Momentum only

Correct Answer: (C) Energy

Electromagnetic Induction

12. According to Faraday's law, induced emf is related to the:

(A) Electric charge stored(B) Rate of change of magnetic flux(C) Resistance only(D) Mass of the conductor

Correct Answer: (B) Rate of change of magnetic flux

Alternating Current

13. In a purely inductive AC circuit, current:

(A) Leads voltage by 90°(B) Lags voltage by 90°(C) Is always in phase with voltage(D) Is always zero

Correct Answer: (B) Lags voltage by 90°

Electromagnetic Waves

14. Electromagnetic waves can propagate through:

(A) Only solids(B) Only liquids(C) Only gases(D) Vacuum as well as material media

Correct Answer: (D) Vacuum as well as material media

Electromagnetic Waves

15. Which electromagnetic radiation has the highest frequency among the following?

(A) Radio waves(B) Microwaves(C) Visible light(D) Gamma rays

Correct Answer: (D) Gamma rays

Ray Optics

16. For a convex lens, when an object is placed between the optical centre and focus, the image formed is:

(A) Real, inverted and diminished(B) Virtual, erect and magnified(C) Real and same size(D) Virtual and diminished

Correct Answer: (B) Virtual, erect and magnified

Ray Optics

17. Total internal reflection can occur when light travels:

(A) From rarer to denser medium at any angle(B) From denser to rarer medium with angle greater than critical angle(C) Only through vacuum(D) Only at normal incidence

Correct Answer: (B) From denser to rarer medium with angle greater than critical angle

Wave Optics

18. According to Huygens' principle, every point on a wavefront acts as a source of:

(A) Electrons(B) Secondary wavelets(C) Protons(D) Magnetic poles

Correct Answer: (B) Secondary wavelets

Wave Optics

19. In Young's double-slit experiment, interference demonstrates the:

(A) Particle nature of light only(B) Wave nature of light(C) Nuclear nature of light(D) Chemical nature of light

Correct Answer: (B) Wave nature of light

Dual Nature of Radiation

20. The photoelectric effect supports the:

(A) Wave nature of electrons only(B) Particle nature of light(C) Absence of photons(D) Classical theory alone

Correct Answer: (B) Particle nature of light

Atoms

21. According to Bohr's model, electrons in stationary orbits:

(A) Continuously radiate energy(B) Do not radiate energy(C) Have zero angular momentum(D) Remain outside the atom

Correct Answer: (B) Do not radiate energy

Nuclei

22. Nuclear force is characterized by being:

(A) Very weak and long-range(B) Strong and short-range(C) Only gravitational(D) Independent of nucleons

Correct Answer: (B) Strong and short-range

Semiconductor Electronics

23. A p-type semiconductor is obtained by doping pure silicon with a:

(A) Pentavalent impurity(B) Trivalent impurity(C) Monovalent impurity(D) Noble gas

Correct Answer: (B) Trivalent impurity

Semiconductor Electronics

24. A p-n junction diode allows current to flow easily when it is:

(A) Reverse biased(B) Forward biased(C) Unbiased only(D) Connected to an AC source without any circuit

Correct Answer: (B) Forward biased

Semiconductor Electronics

25. The main function of a transistor in a common-emitter configuration can be:

(A) Only heating(B) Amplification of signals(C) Only producing light(D) Converting protons into electrons

Correct Answer: (B) Amplification of signals

CBSE Class 12 Physics • Theory PYQ-Based Practice • 25 MCQs