Nuclear Radiation | Practice MCQs Physics for Mdcat By Engr Kamran Soomro | mosaicbro.com

Nuclear Radiation | Practice MCQs Physics for Mdcat By Engr Kamran Soomro

7 of 83 questions (Page 3 of 12)

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15 15. In pair-production, Gamma-ray photon is converted into:
Correct Answer: D
Explanation: Pair production creates electron-positron pairs when $\gamma$-ray energy exceeds $1.02\ \text{MeV}$.
16 16. The range of $\gamma$-radiation is:
Correct Answer: C
Explanation: Range depends on material density and $\gamma$-ray energy.
17 17. Capture of a neutron by a nucleus produces:
Correct Answer: A
Explanation: Neutron capture often results in a radioactive isotope.
18 18. Which of the following is electromagnetic in nature:
Correct Answer: C
Explanation: $\gamma$-rays are part of the electromagnetic spectrum.
19 19. Which of the following materials is used for shielding $\gamma$-radiations?
Correct Answer: B
Explanation: Lead's high density effectively attenuates $\gamma$-rays.
20 20. Which of the following is not a radiation detector?
Correct Answer: C
Explanation: Cyclotron is a particle accelerator, not a detector.
21 21. Wilson cloud chamber is an instrument used for:
Correct Answer: C
Explanation: It visualizes particle tracks via condensation trails.
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