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.
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) Define nuclear fission as the splitting of a large unstable nucleus." 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
Misunderstanding Nuclear Fission
Students often confuse nuclear fission with nuclear fusion, thinking both involve the splitting of nuclei.
Remember that nuclear fission specifically refers to the splitting of a large unstable nucleus, while nuclear fusion involves the joining of two light nuclei.
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