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PU CSS 2026 Practice Test Physics Nuclear Physics Free Quiz 1

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PU CSS 2026 Practice Test Physics Nuclear Physics Free Quiz 1

Practice PU CSS 2026 Physics MCQs from Nuclear Physics. Get instant results with Explanation.

General10 MCQs

1. What is radioactivity?

A. Spontaneous emission of radiation from unstable nucleiB. Chemical reactionC. Nuclear fissionD. Nuclear fusion

2. Who discovered radioactivity?

A. Marie CurieB. Henri BecquerelC. RutherfordD. Einstein

3. What are the three types of radiation?

A. Alpha onlyB. Beta onlyC. Alpha, beta, and gammaD. X-rays only

4. What happens in alpha decay?

A. Emits an alpha particle (₂He⁴)B. Emits an electronC. Emits a gamma rayD. Emits a positron

5. How do mass number and atomic number change in alpha decay?

A. Mass number decreases by 2, atomic number decreases by 4B. Mass number decreases by 4, atomic number decreases by 2C. Mass number decreases by 4, atomic number decreases by 4D. Mass number decreases by 2, atomic number decreases by 2

General10 MCQs

6. What are the properties of alpha particles?

A. High penetrating powerB. Low ionizing powerC. Low penetrating power, high ionizing powerD. No penetrating power

7. What is the charge of an alpha particle?

A. +1eB. -1eC. 0D. +2e

8. What happens in beta decay?

A. Neutron → proton + electron + antineutrinoB. Proton → neutron + positron + neutrinoC. Gamma emissionD. Alpha emission

9. How do mass number and atomic number change in beta decay?

A. Mass number decreasesB. Mass number same, atomic number increases by 1C. Atomic number decreasesD. Both mass number and atomic number change

10. What is gamma decay?

A. Emission of gamma rays from an excited nucleusB. Emission of alpha particlesC. Emission of beta particlesD. Emission of positrons

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