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 1 of 12)

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1 1. An alpha particle exerts larger coulomb force on nearby charges than electron because its charge is:
Correct Answer: C
Explanation: An alpha particle has a charge of $+2e$, which is twice the charge of an electron ($-e$).
2 2. Which of the following produces more ionization while passing through a gas:
Correct Answer: A
Explanation: Alpha particles have high ionization power due to their large mass and charge.
3 3. Alpha particles are highly ionized because of their:
Correct Answer: B
Explanation: Their high charge ($+2e$) and low speed allow strong interactions with matter.
4 4. The distance traveled by a particle from the source to point where it is stopped in the medium called:
Correct Answer: A
Explanation: Range is the maximum distance a particle travels before stopping.
5 5. The range of alpha particles in air is less because:
Correct Answer: B
Explanation: Intense ionization causes rapid energy loss, limiting range.
6 6. Which of the particles does not produce fluorescence in substance like barium platino-cyanide:
Correct Answer: C
Explanation: Gamma rays are less likely to cause fluorescence compared to $\alpha$/$\beta$ particles.
7 7. $\beta$-particles ionize the atoms due to:
Correct Answer: A
Explanation: $\beta$-particles (electrons) repel orbital electrons via Coulomb force.
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