A nuclear reactor uses control rods made of MCQ with Answer and Explanation

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A nuclear reactor uses control rods made of

A. Heavy water

B. Cadmium

C. Graphite

D. Uranium

Answer: Option B

Solution (By JKExamLibrary)

Cadmium or boron absorb neutrons to control chain reaction.

This question belongs to: Science Physics

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Question #1

The unit of magnetic flux is

A. Henry

B. Weber

C. Farad

D. Tesla

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Correct Answer: Option B

Explanation:
Weber (Wb) = T m².

This question belongs to: Science Physics

Question #2

A car starts from rest and accelerates uniformly at 2 m/s² for 10 s. Distance covered in 10th second is

A. 10 m

B. 19 m

C. 20 m

D. 2 m

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Correct Answer: Option B

Explanation:
s_nth = u + (a/2)(2n-1) = 0 + (2/2)(20-1) = 19 m.

This question belongs to: Science Physics

Question #3

The gas used in refrigerators is

A. Freon

B. Oxygen

C. Carbon dioxide

D. Nitrogen

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Correct Answer: Option A

Explanation:
Freon (CFC) was used as refrigerant; now HFCs used. Freon is common answer in exams.

This question belongs to: Science Physics

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