Bihar Board Class 12 Physics Question Paper 2024 PDF with Answer Key

BSEB 12th Physics Exam 2024: The Bihar School Examination Board (BSEB) is likely to conduct the Class 12 examination in February 2025. Physics is one of the most important and difficult subjects in the science stream. With exam time approaching fast, students should devote their time to preparation and revision. An important part of the preparation is to check the paper pattern of last year. This will help students to understand the question paper structure for the 2025 exam. 

On that note, we have provided here the question paper for the BSEB Class 12 Physics Exam 2024, along with the answer key. The BSEB Class 12 Physics answer key is prepared by in-house subject experts at Jagran Josh and will be helpful for students preparing for the 2025 exam. Check the Bihar Board Class 12 Physics Paper 2024 PDF and Answer Key here.

BSEB Class 12 Physics Question Paper Pattern 2024

The Bihar board class 12 Physics exam was for a total of 70 marks (theory) and comprised 3 hour time duration. 15 minutes were provided to read the question paper. The question paper structure for the BSEB Class 12 Physics Exam 2024 is as follows:

The Physics question paper is divided into two sections- Section A and Section B.

For answering the objective-type questions in Section A, students were required to darken the circle with a blue/black ball pen against the correct option on the OMR answer sheet provided to them.

Bihar Board Class 12 Physics Question Paper 2024

View and Download the full BSEB Class 12 Physics question paper below:

Bihar Board Class 12 Physics Paper Answer Key 2024 Set C

Question 1: Which of the following is blocked by a capacitor?

(A) AC

(B) DC

(C) Both AC and DC

(D) Neither AC nor DC

Answer: (B) DC

Question 2: Two bulbs of 40W and 60W are connected to 220 V source. The ratio of their resistances will be

(A) 4:3

(B) 3:4

(C) 2:3

(D) 3:2

Answer: (B) 3:4

Question 3: The resistance of any wire is 500 Ω. It's electrical conductivity will be

(A) 0.002 ohm^-1

(B) 0.02 ohm^-1

(C) 50 ohm^-1

(D) 500 ohm^-1

Answer: (A) 0.002 ohm^-1

Question 4: n equal resistors are first connected in series and then in parallel. The ration of maximum and minimum resistances will be

(A) 1/n

(B) n

(C) 1/n²

(D) n²

Answer: (D) n²

Question 5: To increase the sensitivity of a potentiometer

(A) the cross-section area of its wire will have to be increased

(B) current in its wire will have to be decreased

(C) current in its wire will have to be increased

(D) length of its wire will have to be increased

Answer: (D) length of its wire will have to be increased

Question 6: Kirchhoff's second law of electricity is related to

(A) conservation of mass

(B) conservation of charge

(C) conservation of energy

(D) conservation of momentum

Answer: (C) conservation of energy

Question 7: Which one of the following is not a unit of magnetic field?

(A) tesla

(B) weber/metre²

(C) newton/ampere-metre

(D) newton/ampere²

Answer: (D) newton/ampere²

Question 8: Photocell is based on

(A) chemical effect of current

(B) photo electric effect

(C) magnetic effect of current

(D) electro-magnetic induction

Answer: (B) photo electric effect

Question 9: Cathode rays are group of

(A) electrons

(B) protons

(C) neutrons

(D) atoms

Answer: (A) electrons

Question 10: The half-life of radioactive substance is

(A) 0.6931 x λ

(B) log10²/ λ

(C) 0.6931/ λ

(D) Average age/.6931

Answer: (C) 0.6931/ λ

Question 11: S.I. unit of decay constant is

(A) metre

(B) hertz

(C) per metre

(D) metre²

Answer: (B) hertz

Question 12: Number of neutrons in an atom of ₉₀Th²³⁰ is

(A) 320

(B) 230

(C) 140

(D) 90

Answer: (C) 140

Question 13: P.N junction diode is used as

(A) an amplifier

(B) an oscillator

(C) a modulator

(D) a rectifier

Answer: (D) a rectifier

Question 14: Instrument used to increase input voltage/current is called

(A) oscillator

(B) amplifier

(C) diode

(D) rectifier

Answer: (B) amplifier

Question 15: Unit of linear charge density is

(A) coulomb/metre

(B) coulomb x metre

(C) metre/coulomb

(D) none of these

Answer: (A) coulomb/metre

Question 16: The dimensional formula of intensity of electric field is

(A) [MLT²A^-1]

(B) [MLT³A^-1]

(C) [MLT^-3A]

(D) [ML²T^-3A^-1]

Answer: (B) [MLT³A^-1]

Question 17: Number of electrons present in 8 coulomb negative charge is

(A) 5 x 10¹⁹

(B) 2.5 x 10¹⁹

(C) 12.8 x 10¹⁹

(D) 1.6 x 10¹⁹

Answer: (A) 5 x 10¹⁹

Question 18: Two equal and opposite charges of 5 coulomb are kept mutually at a distance of 5.0 cm. The electric dipole moment of the system is

(A) 5 x 10^-2 coulomb-metre

(B) 25 x 10^-2 coulomb-metre

(C) 1 coulomb-metre

(D) zero

Answer: (D) zero

Question 19: on moving from the surface of a charged metallic sphere to the centre of the sphere, the electric field

(A) decreases

(B) increases

(C) remains same as at the surface

(D) zero at all places

Answer: (D) zero at all places

Question 20: n electric dipoles are situated in a closed surface. Total electric flux coming out from closed surface will be

(A) q/ε₀

(B) 2q/ε₀

(C) nq/ε₀

(D) zero

Answer: (D) zero

Question 21: In broad side on position, the electric potential due to electric dipole is

Answer: (C) zero

Question 22: A magnet is situated near a closed conductor. Current can be produced in the conductor, if

(A) only magnet is in motion

(B) only conductor is in motion

(C) both magnet and conductor are in motion

(D) there is relative motion between magnet and conductor

Answer: (D) there is relative motion between magnet and conductor

Question 23: The value of current obtained in a moving coil galvanometer is proportional to

(A) deflection (θ)

(B) resistance (R)

(C) magnetic field (B)

(D) none of these

Answer: (A) deflection (θ)

Question 24: A galvanometer is converted into ammeter by adding

(A) low resistance in parallel

(B) high resistance in series

(C) low resistance in series

(D) high resistance in parallel

Answer: (A) low resistance in parallel

Question 25: The magnetic field produced at the centre of current carrying circular coil is

(A) on the plane of coil

(B) perpendicular to the plane of coil

(C) at 45 degree to the plane of coil

(D) at 180 degree to the plane of coil

Answer: (B) perpendicular to the plane of coil

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Stay Tuned as we upload the answers soon.

 Related:

BSEB Class 12 Date Sheet 2024

Bihar Board Class 12 Physics Model Paper 2024 Download PDF