41. Nuclear reactors are provided with shield to guard against the emission of mainly __________ rays.
42. Nucleus of tritium has __________ neutrons.
43. The half life period of a radiactive element is 100 days. After 400 days, one gm of the element will be reduced to __________ gm.
44. Neutrons have mass approximately equal to that of __________ atoms.
45. A nuclear reactor can't be used for
46. The main purpose of control rod in a nuclear reactor is to control the
47. MeV is the unit of
48. Which of the following is not used as a moderator in nuclear reactor?
49. Uranium Corporation of India Limited (UCIL) engaged in the mining & concentration of uranium ore is located at
50. Final product of uranium extraction plant at Jadugoda (Bihar) is
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