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R is the safe limit of radiation exposur...

___________ R is the safe limit of radiation exposure per week .

A

25 milli

B

2.5 milli

C

250 milli

D

2500 milli

Text Solution

Verified by Experts

The correct Answer is:
C
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SURA PUBLICATION-NUCLEAR PHYSICS-ADDITIONAL QUESTIONS & ANSWER (CHOOSE THE CORRECT ANSWER)
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  2. The ionization potential for Lithium ion is

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  3. R is the safe limit of radiation exposure per week .

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  4. Radioactive materials are kept in thick-walled containers.

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  6. In Uncontrolled chain reactions, the number of fission producing neutr...

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  7. The energy required to remove an electron in a hydrogen atom from n=10...

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  8. Chain reaction is possible only when the loss of neutrons is the neut...

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  9. Minimum size of a system in which at least 1 neutron is available for ...

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  10. Chain reaction is possible , only if the size of system is the critic...

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  11. Natural uranium consists of % of U^(235) and % of U^(238).

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  12. U^(238) is fissionable neutrons.

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  13. is fissionable by neutrons of all energies.

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  14. Atom bomb explosions produce waves.

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  15. The first nuclear reavtor was built at

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  16. In order to supply neutrons for research purpose , we use reactors.

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  17. For production of radio-isotopes , we use reactions.

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  18. A good slows down neutrons by elastic collisions and it does not remo...

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  19. Commonly used moderators are and .

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  20. Graphite is used as a in nuclear reactors.

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