Question

Which of the following forms the basis of a nuclear reactor?

(a) Uncontrolled chain reaction

(b) Fast nuclear reaction

(c) Controlled chain reaction

(d) Catalyst controlled nuclear reaction

I have been asked this question by my college professor while I was bunking the class.

This key question is from Nuclear Force topic in division Nucleus of Physics – Class 12

Answer 1

Correct choice is (c) Controlled chain reaction

The explanation is: In a chain reaction, the fast-moving neutrons are absorbed by certain substances known as moderators such as heavy water, then the number of fissions can be controlled and the chain reaction in such a case is known as a controlled chain reaction. This forms the basis of a nuclear reactor.