SPSC Lecturer Physics Past Papers

Which of the following is not a postulate of Kinetic molecular theory of gases?

1. In gases there is a predominance of intermolecular energy
2. Collisions of gas molecules are elastic
3. All molecules have same speed at different temperatures
4. Do not exert the same pressure in all directions

How many fission take place per second in a 300 MW reactor, assuming each fission releases 200 MeV of energy?

1. 2.38 x 10^18
2. 9.38 x 10^18
3. 4.38 x 10^18
4. 8.38 x 10^18

During projectile motion, the horizontal component of velocity?

1. Changes with time
2. Becomes zero
3. Remains constant
4. Increases with time

Soap film exhibits brilliant colours in sun light due to?

1. Dispersion of light
2. Interference of light
3. Diffraction of light
4. Scattering of light

Increase in the entropy means the increase in?

1. Disorder
2. Unavailability of energy
3. Randomness

The light of suitable frequency falling on metal surface ejects electrons, this phenomenon is called?

1. X-ray emission
2. Compton effect
3. Nuclear fission
4. Photoelectric effect

Which of the following series of H-spectrum lies in ultraviolet region?

1. Lyman series
2. Balmer series
3. Paschen series
4. Bracket series

Choose the correct statement for a nuclear reactor?

1. Moderator slow down the neutron
2. Moderator bring the neutrons to rest
3. Moderator absorb the neutron
4. Moderator reflect the neutron

Average distance covered by alpha particle in air before its ionizing power ceases is called its?

1. Trajectory
2. Range
3. Firing level
4. Limit

The net electric field is zero?

1. Inside any conductor
2. Inside any conductor with a static charge
3. Inside any material, conductor or insulator, with a static charge
4. The electric field cannot be zero