In a nuclear reactor, the function of a moderator is to MCQ with Answer and Explanation

In a nuclear reactor, the function of a moderator is to
A. Remove heat
B. Control chain reaction
C. Absorb neutrons
D. Slow down neutrons
Answer: Option D
Solution (By JKSSB Mock Tests)
Moderator slows fast neutrons to thermal energies to increase probability of fission. Common moderators: heavy water, graphite. Control rods (cadmium, boron) absorb neutrons. Coolant removes heat.

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Practice More Physics Questions

Question #1
The distance between two consecutive compressions in a longitudinal wave is called
A. Frequency
B. Wavelength
C. Amplitude
D. Time period

Correct Answer: Option B


Explanation:
Wavelength.

This question belongs to: Science Physics
Question #2
The Q factor of a resonant LCR circuit is measure of
A. Power factor
B. Impedance
C. Reactance
D. Selectivity

Correct Answer: Option D


Explanation:
Higher Q means sharper resonance, better selectivity.

This question belongs to: Science Physics
Question #3
A wave of frequency 500 Hz has speed 350 m/s. Wavelength is
A. 1.43 m
B. 0.7 m
C. 175 m
D. 70 m

Correct Answer: Option B


Explanation:
λ = v/f = 350/500 = 0.7 m.

This question belongs to: Science Physics