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 10 of 12)

Filter by Category

64 68. It is a drawback of G.M. counter:
Correct Answer: C
Explanation: Dead time limits fast counting rates.
65 69. Roentgen is the unit of:
Correct Answer: D
Explanation: Roentgen (R) measures ionization from X-rays/$\gamma$-rays.
66 70. The most useful tracer is:
Correct Answer: C
Explanation: Carbon-14 is ideal for biological/archaeological tracing.
67 71. A device that may be used to detect the passage of a single, light energy charged particle is called a:
Correct Answer: C
Explanation: Geiger counters detect individual ionizing particles.
68 72. Which of the following will be a better shield against $\gamma$-rays:
Correct Answer: D
Explanation: Lead's high density effectively blocks $\gamma$-rays.
69 73. Wilson cloud chamber is an instrument used for:
Correct Answer: C
Explanation: Visualizes particle tracks via condensation.
70 74. In Wilson cloud chamber, the $\beta$-particle leave:
Correct Answer: D
Explanation: $\beta$-particles produce faint, irregular tracks.
MCQs Bank by mosaicbro.com