Question detail

How do control rods function in a nuclear reactor?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Nuclear fission and fusion

Question

A. They release neutrons to increase fission
B. They absorb neutrons to control the chain reaction
C. They generate electricity
D. They split large nuclei

Answer

The correct answer is B: They absorb neutrons to control the chain reaction.

Explanation

The correct answer is B: They absorb neutrons to control the chain reaction. This supports the learning objective "(Physics only) Interpret simple diagrams of nuclear fission and chain reactions." in Nuclear fission (physics only) because it uses the correct atomic and nuclear radiation relationship for Nuclear fission and fusion. The other options are less suitable because they do not match the required Nuclear fission (physics only) idea: They release neutrons to increase fission; They generate electricity; They split large nuclei.

Common mistake

Misinterpreting Diagrams

Students often confuse the roles of neutrons and fission products in nuclear fission diagrams.

Carefully label each part of the diagram and ensure you understand the function of neutrons in initiating further fission events.

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