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Physics · May / June 2023 · Paper 12 · Question 38

5054Fission and fusion

What is the purpose of moderators in nuclear reactors?

  1. Ato absorb all the neutrons in order to stop the chain reaction
  2. Bto produce more neutrons in order to create a chain reaction
  3. Cto remove thermal energy in order to control the chain reaction
  4. Dto slow down neutrons in order to continue the chain reaction

As printed in the paper

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Correct answer: D. to slow down neutrons in order to continue the chain reaction

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