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(a) What are thermal neutrons in the con...

(a) What are thermal neutrons in the context of nuclear fission ?
(b) What role does a moderator play in a nuclear reactor ?

A

to control the energy released in the reactor

B

to absorb neutrons and stop the chain reaction

C

to cool the reactor

D

to slow down the neutron to thermal energies

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The correct Answer is:
D
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CP SINGH-NUCLEAR PHYSICS AND RADIO ACTIVITY-EXERCISES
  1. Choose the correct option (a) Atom bomb is based on nucleus fission ...

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  2. The power obtained in a reactor using U^(235) disintergration is 1000k...

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  3. (a) What are thermal neutrons in the context of nuclear fission ? (b...

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  4. Fast neutrons can easily be slowed down by

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  5. Cadmium and Broron rods are used in a nuclear reactor to

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  6. When .92 U^235 undergoes fission, 0.1 % of its original mass is change...

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  7. In a fission process, nucleus A divides into two nuclei B and C, their...

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  8. Energy released in the fission of a single .92 U^235 nucleus is 200 Me...

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  9. The enegry released per fission of .^(235)u is nearly

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  10. A slow neutron can cause fission in

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  11. 200 MeV of energy may be obtained per fission of U^235. A reactor is g...

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  12. If 5g of .^(235)U is completely destroyed in a reactor, the energy rel...

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  13. Which of the following is correct regarding Nuclear fusion? (i) Whe...

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  14. Fusion reaction takes place at high temperature because

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  15. Solar energy is mainly caused due to

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  16. If in a nuclear fusion process the masses of the fusing nuclei be m(1)...

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  17. From the following equations pick out the pssible nuclear fusion react...

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  18. A nuclear fusion reaction is given by .(1)H^(2)+.(1)H^(2)rarr.(1)He^...

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