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Q: A nuclear reactor is said to have become 'critical' when

  • 1
    it stops due to malfunctioning
  • 2
    it starts emitting dangerous radioactive radiations
  • 3
    it is shut down to avoid explosion
  • 4
    it is ready to produce controlled energy
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Answer : 4. "it is ready to produce controlled energy"
Explanation :

Answer: D) it is ready to produce controlled energy Explanation: To produce controlled energy i.e energy at a controlled or steady rate, the number of fissions per second must be controlled and maintained at that rate. Excess neutrons should be absorbed by control roads like cadmium.

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