CBSE Class 12 Physics Compartment Question Paper Solved 2018 Set 1

CBSE Class 12 Physics Compartment Question Paper Solved 2018 Set 1. Students can download the last year question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

SECTION-A 

1. An electron is accelerated through a potential difference V. Write the expression for its final speed, if it was initially at rest.

2. Two protons of equal kinetic energies enter a region of uniform magnetic field. The first proton enters normal to the field direction while the second enters at 30to the field direction. Name the trajectories followed by them.

3. Draw a graph showing the intensity distribution of fringes due to diffraction at single slit.

4. Write the range of frequencies of electromagnetic waves which propagate through sky wave mode.

5. Define the power of a lens. Write its S.I. unit.

SECTION-B

6. (a) Define the term magnetic susceptibility and write its relation in terms of relative magnetic permeability.

(b) Two magnetic materials A and B have relative magnetic permeabilities of 0.96 and 500. Identify the magnetic materials A and B.

7. (a) Give one use of electromagnetic radiations obtained in nuclear disintegrations.

(b) Give one example each to illustrate the situation where there is (i) displacement

current but no conduction current and (ii) only conduction current but no displacement current.

8. Calculate the ratio of the frequencies of the radiation emitted due to transition of the electron in a hydrogen atom from its (i) second permitted energy level to the first level and (ii) highest permitted energy level to the second permitted level.

9. (a) Define SI unit of current in terms of the force between two parallel current carrying conductors.

(b) Two long straight parallel conductors carrying steady currents I_a and I_b along the same direction are separated by a distance d. How does one explain the force of attraction between them ? If a third conductor carrying a current I_c in the opposite direction is placed just in the middle of these conductors, find the resultant force acting on the third conductor.

Please click the link below to download pdf file of CBSE Class 12 Physics Compartment Question Paper Solved 2018 Set 1.