CBSE Class 12 Physics Boards 2020 Question Paper Set 01 Solved

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Here is CBSE Class 12 Physics Boards 2020 Question Paper Set 01 Solved for your practice. Download official Class 12 Physics previous year question papers featuring complete solutions, matched with the 2026-27 syllabus standards of CBSE, NCERT, and KVS. Solving these papers lets students track their progress and study efficiently.

Solved Physics Question Papers for Class 12

Try these Class 12 Physics question papers to master the exam pattern and learn how marks are awarded. Practicing under exam conditions will make Class 12 students much faster and precise. Download the full CBSE Class 12 Physics Boards 2020 Question Paper Set 01 Solved to evaluate your skills today.

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SECTION A

1. If the net electric flux through a closed surface is zero, then we can infer
 
(A) no net charge is enclosed by the surface.
 
(B) uniform electric field exists within the surface.
 
(C) electric potential varies from point to point inside the surface. 
 
(D) charge is present inside the surface.
 
2. An electric dipole consisting of charges + q and – q separated by a distance L is in stable equilibrium in a uniform electric field E. The electrostatic potential energy of the dipole is 
 
(A) qLE
 
(B) zero
 
(C) – qLE
 
(D) – 2 qEL
 
3. A potentiometer can measure emf of a cell because 
 
(A) the sensitivity of potentiometer is large.
 
(B) no current is drawn from the cell at balance.
 
(C) no current flows in the wire of potentiometer at balance.
 
(D) internal resistance of cell is neglected.
 
4. Two resistors R1 and R2 of 4 Ω and 6 Ω are connected in parallel across a battery. The ratio of power dissipated in them, P1 : P2 will be 
 
(A) 4 : 9
 
(B) 3 : 2
 
(C) 9 : 4
 
(D) 2 : 3
 
5. The magnetic dipole moment of a current carrying coil does not depend upon 
 
(A) number of turns of the coil.
 
(B) cross-sectional area of the coil.
 
(C) current flowing in the coil.
 
(D) material of the turns of the coil.
 
6. Larger aperture of objective lens in an astronomical telescope 
 
(A) increases the resolving power of telescope.
 
(B) decreases the brightness of the image.
 
(C) increases the size of the image.
 
(D) decreases the length of the telescope.
 
7. A biconvex lens of glass having refractive index 1·47 is immersed in a liquid. It becomes invisible and behaves as a plane glass plate. The refractive index of the liquid is 
 
(A) 1·47
 
(B) 1·62
 
(C) 1·33
 
(D) 1·51
 
8. For a glass prism, the angle of minimum deviation will be smallest for the light of 
 
(A) red colour.
 
(B) blue colour.
 
(C) yellow colour.
 
(D) green colour.
 
9. Which of the following statements is not correct according to Rutherford model ? 
 
(A) Most of the space inside an atom is empty.
 
(B) The electrons revolve around the nucleus under the influence of coulomb force acting on them.
 
(C) Most part of the mass of the atom and its positive charge are concentrated at its centre.
 
(D) The stability of atom was established by the model.
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