alleryWhich material is commonly used as control rods in a nuclear reactor to absorb neutrons?
AUranium
BGraphite
CCadmium
DConcrete
Answer & Solution
Correct answer: C. Cadmium
1. Control rods regulate the chain reaction by absorbing excess neutrons.
2. Boron or cadmium rods are used because they readily absorb neutrons.
3. Graphite is a moderator (slows neutrons), not an absorber.
4. Uranium is the fuel and concrete is the shield.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 6 Nuclear Physics "Nuclear Physics", p.91_
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