CBSE Class 12 Physics Exam 2025: Check Pattern, Most Important MCQs

Doing well in Session A of the CBSE Class 12 Physics Exam 2025 will have an important influence in boosting the overall score.. For last-minute preparation, we at Adda247 have compiled your most important MCQs for CBSE Class 12 Physics Board Paper preparation on this page. This paper was written by highly qualified subject matter experts after an in-depth review of the Class 12 Physics previous year papers in detail. Scroll down this page to get the CBSE Class 12 Most Expected Important MCQs.

CBSE Class 12 Physics Exam 2025

The Central Board of Secondary Education (CBSE) has scheduled the CBSE 12th Physics Board Exam 2025 for February 21, 2025. With only one day left, students must focus on essential topics, practise previous year’s papers and revise critical numerical problems in order to score well.

The CBSE Class 12th Physics question paper 2025 consists of 20% multiple-choice questions (MCQs), 30% competency-based questions (e.g. case-based, source-based), and 50% short/long answer questions. Read the complete story to learn about the physics question pattern; the majority of weightage subjects are discussed on this page

CBSE Class 12th Physics Paper Pattern 2025

The CBSE Class 12th Physics Paper 2025 specifies a Physics question paper with 30 compulsory questions, separated into five sections (A-E), 70 marks, and a 3-hour timeframe. Check out the sectionwsie marks distribution given in the table below.

CBSE Class 12 Physics Most Expected Important MCQs

Q1. The electric field at a point on the axis of an electric dipole is directed:
(a) Perpendicular to the dipole
(b) Along the dipole moment
(c) Opposite to the dipole moment
(d) None of these

Answer: (b)
Sol. The electric field along the axis of an electric dipole aligns with the dipole moment direction.

Q2. A wire of resistance R is stretched to double its original length. The new resistance of the wire will be:
(a) 2R
(b) 4R
(c) R/2
(d) R/4

Ans.(b)
Sol. Resistance increases as the square of the stretching factor; R_new = 4R.

Q3. The drift velocity of electrons in a conductor is v when a potential difference V is applied across it. If V is doubled, the drift velocity will be:
(a) v/2
(b) v
(c) 2v
(d) 4v
Answer:  Ans.(c)
Sol. Drift velocity is directly proportional to applied voltage.

Q4. Kirchhoff’s first law is based on the conservation of:
(a) Energy
(b) Charge
(c) Momentum
(d) Angular momentum
Answer: Ans.(b)
Sol. Kirchhoff’s first law is based on charge conservation.

Q5. In a moving coil galvanometer, the deflection of the coil is proportional to:
(a) Current
(b) Charge
(c) Resistance
(d) Voltage
Answer: Ans.(a)
Deflection in a galvanometer is proportional to the current.

Q6. A charged particle moves perpendicular to a uniform magnetic field. The path followed by the particle is:
(a) Straight line
(b) Parabola
(c) Circle
(d) Ellipse
Answer: Ans.(c)
Sol. A charged particle in a perpendicular magnetic field follows a circular path.

Q7. The strength of an electromagnet can be increased by:
(a) Increasing the number of turns in the coil
(b) Using a laminated core
(c) Using a soft iron core
(d) All of these
Answer: Ans.(d)
Sol. All methods listed increase the strength of an electromagnet

Q8. Lenz’s law is a consequence of:
(a) Conservation of energy
(b) Conservation of charge
(c) Conservation of momentum
(d) Conservation of mass
Answer: Ans.(a)
Sol. Lenz’s law ensures energy conservation by opposing the cause.

Q9. A transformer works on the principle of:
(a) Ohm’s law
(b) Faraday’s law of electromagnetic induction
(c) Kirchhoff’s law
(d) Coulomb’s law
Answer: Ans.(b)
Sol. Transformers operate on electromagnetic induction

Q10. The inductive reactance of a coil increases when:
(a) Frequency increases
(b) Resistance increases
(c) Capacitance decreases
(d) Voltage increases
Answer: Ans.(a)
Sol. Inductive reactance increases with increasing frequency.

Q11. The power factor of a purely inductive circuit is:
(a) 0
(b) 1
(c) 0.5
(d) √2
Answer: Ans.(a)
Sol. In a purely inductive circuit, the power factor is zero.

Q12. The focal length of a convex lens is maximum when it is placed in:
(a) Air
(b) Water
(c) Glass
(d) Oil

Answer: Ans.(a)

Sol. Air

Q13. A ray of light passing through the optical center of a lens:
(a) Deviates from its path
(b) Passes undeviated
(c) Reflects back
(d) Gets scattered

Answer: Ans.(b)

Sol. Passes undeviated

Q14. A convex lens behaves as a diverging lens when placed in a medium whose refractive index is:
(a) Less than that of the lens
(b) Greater than that of the lens
(c) Equal to that of the lens
(d) Zero

Answer: Ans.(b)

Sol. Greater than that of the lens

Q15. The critical angle for total internal reflection will be minimum for which pair of media?
(a) Air and Glass
(b) Water and Glass
(c) Diamond and Air
(d) Water and Air

Answer: Ans.(c)

Sol. Diamond and Air

Q16. The resolving power of a microscope can be increased by:
(a) Increasing the wavelength of light
(b) Decreasing the refractive index
(c) Using light of shorter wavelength
(d) Decreasing the aperture

Answer: Ans.(c)
Sol. Using light of shorter wavelength

Q17. Photoelectric effect demonstrates the:
(a) Wave nature of light
(b) Particle nature of light
(c) Both (A) and (B)
(d) Neither (A) nor (B)

Answer: Ans.(b)

Sol. Particle nature of light

Q18. A charged conductor is placed in a uniform electric field. The net force on the conductor is:
(a) Always zero
(b) Depends on charge distribution
(c) Maximum at the center
(d) Always nonzero

Answer Ans.(a)

Sol. Always zero

Q19. If a charge is placed inside a hollow conductor, then the induced charge on the inner surface is:
(a) Equal to the placed charge but opposite in sign
(b) Equal in magnitude and sign
(c) Zero
(d) Depends on the conductor

Answer: Ans.(a)

Sol. Equal to the placed charge but opposite in sign

Q20. The capacitance of a parallel plate capacitor is increased n times when a dielectric of dielectric constant K is introduced. The relation between K and n is:
(a) K=n

(b) K=1/n
(c) K=n- 1

(d) K=n+1

Answer: Ans.(a)

Sol. K=n

Q21. A parallel plate capacitor is connected to a battery and is fully charged. If the plate separation is doubled without disconnecting the battery, the energy stored will:
(a) Increase
(b) Decrease
(c) Remain the same
(d) Become zero

Answer: Ans.(b)

Sol. Decrease

Q22. A wire of resistance R is bent into a circle. The resistance between two diametrically opposite points will be:
(a) R
(b) 2R
(c) R/4
(d) R/2

Answer: Ans.(d)

Sol. R/2

Q23. A cell of emf E and internal resistance r is connected across an external resistance R. The voltage across the external resistance is maximum when:
(a) R = r
(b) R >> r
(c) R << r
(d) R = 0

Answer: Ans.(a)

Sol. R = r

Q24. A charged particle moving in a uniform magnetic field follows a helical path. The pitch of the helix depends on:
(a) Charge of the particle
(b) Component of velocity perpendicular to the field
(c) Component of velocity parallel to the field
(d) Strength of the magnetic field

Answer: Ans.(c)

Sol. Component of velocity parallel to the field

Q25. In an LCR circuit at resonance, the power factor is:
(a) 1
(b) 0
(c) 0.5
(d) √2

Answer: (a) 1

To get more CBSE Class 12 Physics MCQs Click here to download the complete pdf.

CBSE Class 12 Physics Practice Sample Question Paper 2025

Practicing Offcial Class 12 Physics Sample Question Paper 2025 CBSE Board will assist students in achieving high scores in the CBSE 12th Physics Board Exam. Apart from this, they can also practice the  CBSE’s previous year Class 12 Board Physics Question Paper for beter understanding. The Official CBSE Class 12 Physics practice paper will allow students to have hands-on experience with the subject prior to the final board exams. This way, they can learn about the significant questions and their entire weightage in the exam. Get the CBSE Class 12 Physics Sample Paper with Solutions by simply clicking the direct link shared below.

CBSE Class 12 Physics Sample Paper with Solutions

CBSE Class 12 Physics One shot – All Chepter Revision

Watch the one-shot video before your Class 12 Physics Exam to complete your chapter-by-chapter revision all at once.

Key Concepts to Revise for CBSE Class 12 Physics Exam 2025

The following are most key topics that students must revise on the last night before the exam. Experts suggest that students can expect more than five questions from these following chepters.

• Electrostatics & Current Electricity – Electric dipole, Gauss’s law, drift velocity
• Magnetism & Electromagnetic Induction – Moving coil galvanometer, AC generator, transformer
• Optics – Refraction, prism, Young’s double-slit experiment, compound microscope, telescope
• Modern Physics – Atomic structure, PN diode, rectifier, energy of an electron in orbit
• Electromagnetic Waves – Properties of magnetic materials, electromagnetic wave characteristics
• Current electricity – Drift velocity, Kirchhoff’s laws, Wheatstone bridge
• Magnetism & electromagnetism – Biot-Savart’s law, torque on a loop, force between conductors
• Important numericals & graph-based questions
  Numericals on – Electric field, capacitance, circuits, magnetic field, force, interference fringe width
  Graph-based questions on – Resistivity vs temperature, photoelectric effect, stopping potential

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