Physics
Which of the following is used as moderator(s) in a nuclear reactor ?
- Cadmium rods
- Graphite
- Heavy Water
- Both (2) and (3)
Answer
Both (2) and (3)
Reason — The chain reaction is a nuclear reactor are controlled by absorbing some of the neutrons emitted in the fission process by means of the cadmium rods and then making them slow by the moderators (such as graphite, heavy water, etc). This way, the energy obtained in fission reaction can be controlled and utilised for constructive purposes.
Related Questions
According to the mass energy equivalence :
- E = Δmc2
- E = mc
- E = Δm/c2
- E = m/c2
In each fission reaction, the …………… remains conserved.
- mass number
- atomic number
- mass
- both (1) and (2)
The source of energy of the sun and stars is obtained from the nuclear fusion of :
- uranium
- thorium
- hydrogen
- 23592U
The temperature required for the process of nuclear fusion is nearly:
- 1000 K
- 104 K
- 105 K
- 107 K