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Nuclei VVI Questions | Physics VVI Objective Question Bihar Board | Bihar Board Class 12th Physics

Nuclei VVI Questions 


Q.1. What are the utilities of moderator coolant and controlling rods with reference to unclear reactor?

Ans – 1. moderator-it is a medium to slow down the fast moving secondary neutrons peoduce during thefission.

Heavy water graphite deuterium paraffins etc acts as moderator.

2. control rods- it is used in nuclear reactors to control the rate of fission of uranium and plutonium. these are made of chemical element capable of absorbing many neutrons without fissioning themselves such as silver indium boron and cadmium.

3 coolant- it is a liquid used to remove heat from nuclear reactor core and teansfer it to electrical generator and environment. ordinary water under high pressure is used as coolant.

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