The difference between a nuclear reactor and an atomic bomb is that
A
no chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction
B
the chain reaction in nuclear reactor is controlled
C
the chain reaction in nuclear reactor is not controlled
D
no chain reaction takes place in atomic bomb while it takes place in nuclear reactor
Correct Answer: Option B
Explanation
1. The question asks for the key difference between a nuclear reactor and an atomic bomb.
2. Both devices utilize the energy released from nuclear fission, which occurs in a chain reaction. In a chain reaction, neutrons released from one fission event cause further fission events.
3. The crucial difference lies in the management of this chain reaction.
4. In an atomic bomb, the chain reaction is designed to multiply exponentially and proceed as rapidly as possible. It is an uncontrolled chain reaction, leading to a massive and instantaneous release of energy (an explosion).
5. In a nuclear reactor, the chain reaction is carefully controlled. Using components like control rods (which absorb neutrons) and moderators (which slow down neutrons), the rate of fission is maintained at a steady level (criticality). This allows for the continuous release of energy at a manageable rate, typically used for generating electricity.
6. Therefore, the main distinction is that the chain reaction in a nuclear reactor is controlled, while it is uncontrolled in an atomic bomb.