CBSE Class 12 Physics Boards 2020 Question Paper Solved Set B

Access and download CBSE Class 12 Physics Boards 2020 Question Paper Solved Set B, carefully designed as per the latest 2025-26 examination guidelines issued by CBSE, NCERT, and KVS. These Class 12 Physics previous year question papers include detailed solutions, helping students to assess their performance and identify and improve key areas before the final exams.

Solved Physics Question Papers for Class 12

Practicing these Class 12 Physics question papers is the best way to understand the actual exam pattern and marking scheme. By solving these papers under timed conditions, Class 12 students can improve their speed and accuracy. Download the full CBSE Class 12 Physics Boards 2020 Question Paper Solved Set B to begin your self-assessment today.

Physics Class 12 Question Paper PDF with Solutions

SECTION A
Note : Select the most appropriate option from those given below each question :
 
1. A cell of internal resistance r connected across an external resistance R can supply maximum current when 
 
(A) R = r
 
(B) R > r
 
(C) R = r/2
 
(D) R = 0
 
2. In a current carrying conductor, the ratio of the electric field and the current density at a point is called 
 
(A) Resistivity
 
(B) Conductivity
 
(C) Resistance
 
(D) Mobility
 
3. An electron is released from rest in a region of uniform electric and magnetic fields acting parallel to each other. The electron will 
 
(A) move in a straight line.
 
(B) move in a circle.
 
(C) remain stationary.
 
(D) move in a helical path.
 
4. Above Curie temperature, a 
 
(A) ferromagnetic material becomes diamagnetic.
 
(B) ferromagnetic material becomes paramagnetic.
 
(C) paramagnetic material becomes ferromagnetic.
 
(D) paramagnetic material becomes diamagnetic.
 
5. Displacement current exists only when 
 
(A) electric field is changing.
 
(B) magnetic field is changing.
 
(C) electric field is not changing.
 
(D) magnetic field is not changing.
 
6. Electromagnetic waves used as a diagnostic tool in medicine are 
 
(A) X-rays.
 
(B) ultraviolet rays.
 
(C) infrared radiation.
 
(D) ultrasonic waves.
 
7. At equilibrium, in a p-n junction diode the net current is 
 
(A) due to diffusion of majority charge carriers.
 
(B) due to drift of minority charge carriers.
 
(C) zero as diffusion and drift currents are equal and opposite.
 
(D) zero as no charge carriers cross the junction.
 
8. In an n-type semiconductor, the donor energy level lies 
 
(A) at the centre of the energy gap.
 
(B) just below the conduction band.
 
(C) just above the valance band.
 
(D) in the conduction band.
 
9. When two nuclei (A ≤ 10) fuse together to form a heavier nucleus, the 
 
(A) binding energy per nucleon increases.
 
(B) binding energy per nucleon decreases.
 
(C) binding energy per nucleon does not change.
 
(D) total binding energy decreases.
 
10. In βdecay, a 
 
(A) neutron converts into a proton emitting antineutrino.
 
(B) neutron converts into a proton emitting neutrino.
 
(C) proton converts into a neutron emitting antineutrino.
 
(D) proton converts into a neutron emitting neutrino.
 
Note : Fill in the blanks with appropriate answer :
 
11. If the electric flux entering and leaving a closed surface in air are Φand Φrespectively, the net electric charge enclosed within the surface is ___________ . 
 
12. In Young’s double slit experiment, the path difference between two interfering waves at a point on the screen is 5λ/2 ' λ,  being wavelength of the light used. The ___________ dark fringe will lie at this point. 
OR
If one of the slits in Young’s double slit experiment is fully closed, the new pattern has __________ central maximum in angular size.
 
Please click on below link to download CBSE Class 12 Physics Boards 2020 Question Paper Solved Set B.

CBSE Class 12 Physics Boards 2020 Question Paper Solved Set B

To understand the types of questions asked in past examinations, it is very important for Class 12 students to solve the CBSE Class 12 Physics Boards 2020 Question Paper Solved Set B provided above. You can easily download these past papers for Class 12 Physics in PDF format for the last 10 years. By practicing these actual exam questions you will gain an understanding of the difficulty level and the variety of topics covered over the years. By solving these Previous Year Papers (PYPs) you will understand both descriptive and MCQ questions in your final tests.

Importance of solving CBSE Class 12 Physics Boards 2020 Question Paper Solved Set B

Regularly practicing CBSE Class 12 Physics Boards 2020 Question Paper Solved Set B is the best way to improve your score in Class 12 Physics. These papers will give you details of the marking scheme and the paper structure used by the CBSE. By regularly attempting these under actual exam conditions at home, you can slowly improve your time management skills, which will help you to complete your Physics paper within the allowed duration.

Benefits of downloading CBSE Class 12 Question Papers

Having the CBSE Class 12 Physics Boards 2020 Question Paper Solved Set B in PDF format allows you to revise key concepts anywhere, even without an internet connection. These sets are a reliable tool to practice numerical problems and understand the correct approach to all types of answers. After solving the questions, you should compare your work with the solutions provided by our teachers. Along with these papers, students should always solve the Class 12 Physics Sample Papers and MCQ tests on studiestoday.com for a complete revision.

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