To generate a power of 3.2 mega watt, the number of fissions of U235 per minute is
(Energy released per fission = 200MeV, 1eV=1.6×10-19 J 

(1) 6×1018        

(2) 6×1017

(3) 1017             

(4) 6×1016

Subtopic:  Nuclear Energy |
 54%
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The average number of prompt neutrons produced per fission of U235 is 

(1) More than 5         

(2) 3 to 5

(3) 2 to 3                 

(4) 1 to 2

Subtopic:  Mass-Energy Equivalent |
 68%
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In an atomic bomb, the energy is released due to

(1) Chain reaction of neutrons and U92235
(2) Chain reaction of neutrons and U92288
(3) Chain reaction of neutrons and P92240
(4) Chain reaction of neutrons and U92286

Subtopic:  Mass-Energy Equivalent |
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If an electron and a positron annihilate, then the energy released is:

1. 3.2×10-13 J       

2. 1.6×10-13 J

3. 4.8×10-13 J           

4. 6.4×10-13 J

Subtopic:  Mass-Energy Equivalent |
 63%
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The energy liberated on complete fission of 1 kg of U92235 is (Assume 200 MeV energy is liberated on fission of 1 nucleus) 

(1) 8.2×1010 J                           

(2) 8.2×109 J

(3) 8.2×1013 J                           

(4) 8.2×1016 J

Subtopic:  Mass-Energy Equivalent |
 62%
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The nuclear reaction H12+H12He24 (mass of deuteron = 2.0141 a.m.u. and mass of He = 4.0024 a.m.u.) is

(1) Fusion reaction releasing 24 MeV energy

(2) Fusion reaction absorbing 24 MeV energy

(3) Fission reaction releasing 0.0258 MeV energy

(4) Fission reaction absorbing 0.0258 MeV energy

Subtopic:  Mass-Energy Equivalent |
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In the following reaction the value of ‘X’ is  
N714+He24X+H11

(1) N817             

(2) O817

(3) O716             

(4) N716

Subtopic:  Types of Decay |
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The binding energy of nucleus is a measure of its

(1) Charge             

(2) Mass

(3) Momentum       

(4) Stability

Subtopic:  Nuclear Binding Energy |
 71%
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Heavy water is

(1) Water at 4°C

(2) Compound of deuterium and oxygen

(3) Compound of heavy oxygen and heavy hydrogen

(4) Water in which soap does not lather

Subtopic:  Nuclear Energy |
 81%
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If M is the atomic mass and A is the mass number, packing fraction is given by:
(1) AM-A           

(2) A-MA
(3)MM-A            

(4) M-AA

Subtopic:  Mass-Energy Equivalent |
 50%
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