Unit 21: Nuclear Physics

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Question 1 of 10 0% read

1. Which radiation consists of helium nuclei?

A Alpha rays

B Beta rays

C Gamma rays

D X-rays

2. The nucleus is extremely small compared to the:

A Electron

B Atom

C Proton

D Neutron

3. Mass number of an atom is equal to:

A Protons only

B Neutrons only

C Protons + electrons

D Protons + neutrons

4. Beta particles are:

A Protons

B Neutrons

C Electrons

D Photons

5. Which nuclear radiation is unaffected by electric fields?

A Alpha

B Beta

C Gamma

D Proton

6. Radioactivity is the process in which a nucleus:

A Gains electrons

B Loses electrons

C Emits radiations

D Absorbs energy

7. Background radiation mainly comes from:

A Television

B Natural sources

C Mobile phones

D Electric wires

8. Fusion requires very high:

A Pressure only

B Temperature only

C Temperature and pressure

D Density only

9. The spontaneous change of a nucleus into another nucleus is called:

A Fusion

B Fission

C Nuclear decay

D Ionization

10. A scientific theory is falsifiable if it can be:

A Proved true

B Observed directly

C Tested and proven false

D Mathematically solved

Unit 21: Nuclear Physics

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