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21th Chapter

### 12th Class Physics Chapter 21 Test

Here you can prepare 12th Class Physics Chapter 21 Test. Click the button for 100% free full practice test.

## 2nd Year Physics Chapter 21 Online MCQ Test for 12th Class Physics Chapter 21 (Nuclear Physics)

This online test contains MCQs about following topics:

- Atomic Nucleus
- Mass Defect and Binding Energy
- Half Life
- Interaction of Radiation With Matter
- Nuclear Reactions
- Nuclear Fission
- Fusion Reaction
- Biological and Medical Uses of Radiation
- Basic Forces of Nature
- Building Blocks of Matter

Ics Part 2 Physics Chapter 21 Test

### 2nd Year Physics Chapter 21 Online MCQ Test for 12th Class Physics Chapter 21 (Nuclear Physics)

1 The radioactive decay obeys the law
• A.
• B.
• C.
• D.
2 A particles equal or greater in mass than of protons are called.
• A. Baryons
• B. Leptons
• C. Mesons
• D. Quarks
3 Two down and one up quarks make
• A. Proton
• B. Neutron
• C. <strike>photon</strike>
• D. Positron
4 The potential difference between the top and bottom of a cloud chamber is of the order of
• A. 290 v
• B. 400 v
• C. 1 kv
• D. None of above
5 The place for soring the nuclear waste is
• A. Ocean
• B. Damping in earth
• C. Damping in desert
• D. Bottom of old salt mines
6 amu =
• A. 1.06 x 10<sup>-27</sup> kg
• B. 1.6606 x 10<sup>-27</sup> kg&nbsp;
• C. 1.520 x 10<sup>-21</sup> kg
• D. 1.6606 x 10<sup>-31</sup> kg
7 Binding energy per nucleus for uranium is above:
• A. 6.7 Mev
• B. 7.7 Mev
• C. 6.9 MeV
• D. 7.9 MeV
8 A positron is a particle having.
• A. Mass equal to electron
• B. Charge equal to electron
• C. Mass equal to mass of electron but charge opposite to charge of electron.
• D. Mass equal to proton
• A. Less of hair
• B. Ulceration
• C. Drop of white blood cells
• D. All
10 The amount of energy equivalent to 1 a.m.u is
• A. 931.5 MeV
• B. 93.15 MeV
• C. 9.315 MeV
• D. 2.224 MeV

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