2nd Year Physics Chapter 7 TestNUCLEAR AND PARTICLE PHYSICS

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. The potential energy called binding energy is considered to have a value similar to absolute gravitational potential:

   1. Positive

   2. Neutral

   3. Negative

   4. Zero

2. An atomic mass unit (u) is defined as 1/12th of the mass of an unbound neutral atom of:

   1. Hydrogen-1

   2. Carbon-12

   3. Uranium-235

   4. Helium-4

3. To start a fusion reaction by increasing atomic speed, the required temperature is about:

   1. 15 thousand kelvin

   2. 1.5 million kelvin

   3. 15 million kelvin

   4. 150 million kelvin

4. When a heavy nucleus splits into two lighter nuclei, the process is called:

   1. Nuclear Fusion

   2. Alpha Decay

   3. Chemical Reaction

   4. Nuclear Fission

5. What remains unchanged in a fusion event?

   1. Energy

   2. Mass of nucleons

   3. Number of nudeons

   4. Temperature

6. Energy is obtained from any nuclear reaction in which the binding energy per nucleon of the products:

   1. Decreases

   2. Increases

   3. Remains zero

   4. Becomes negative

7. What is the energy given out per nucleon during the fission of uranium into barium and krypton?

   1. 7.6 MeV

   2. 8.5 MeV

   3. 0.9 MeV

   4. 211.5 MeV

8. In the nuclide symbol, 'Z' represents:

   1. Mass number

   2. Atomic or charge number

   3. Number of neutrons

   4. Chemical symbo

9. The mass of a nucleus is always:

   1. An integral number of proton masses

   2. Equal to the mass of all other nuclei of the same element

   3. Equal to the sum of the masses of proton and neutron

   4. Less than the sum of masses of the constituent particles

10. The volume of the critical mass of uranium is known as:

    1. Total volume

    2. Critical volume

    3. Atomic volume

    4. Fission volume