CBSE Class 12 Political Science Boards Question Paper Solved 2018 Set 1

CBSE Class 12 Political Science Boards 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. Define the power of a lens. Write its S.I. unit.

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

3. 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 30° to the field direction. Name the trajectories followed by them.

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

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

SECTION-B

6. (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. 

7. 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.

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