Q. A moderator is used in nuclear reactors in order to

A
Increase the number of neutrons
B
Decrese the number of neutrons
C
Slow down the speed of Neutrons
D
Accelerate the Neutrons
Solution:

A moderator is a material used in a nuclear reactor to slow down the neutrons produced from fission. By slowing the neutrons down the probability of a neutron interacting with Uranium-235 nuclei is greatly increased thereby maintaining the chain reaction.

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