In a nuclear fission reaction 

(1) Two light nuclei combine to produce a heavier nucleus

(2) A light nucleus bombarded by thermal neutrons breaks up

(3) A heavy nucleus bombarded by thermal neutrons breaks up

(4) A heavy nucleus breaks up by itself

Subtopic:  Mass-Energy Equivalent |
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Hydrogen bomb is based on which of the following phenomenon

(1) Nuclear fission             

(2) Nuclear fusion

(3) Radioactive decay       

(4) None of these

Subtopic:  Mass-Energy Equivalent |
 66%
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The number of neutrons released when U23592 undergoes fission by absorbing n01 and Ba56144+Kr3689are formed, is 

(1) 0           

(2) 1

(3) 2         

(4) 3

Subtopic:  Mass-Energy Equivalent |
 68%
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Which of the following particle has similar mass to electron

(1) Proton             

(2) Neutron

(3) Positron           

(4) Neutrino

Subtopic:  Mass-Energy Equivalent |
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Neutrino is a particle, which is 

(1) Charged and has spin

(2) Charged and has no spin

(3) Charge less and has spin

(4) Charge less and has no spin

Subtopic:  Mass-Energy Equivalent |
 63%
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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

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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. \(3.2\times 10^{-13}~\text{J}\)
2. \(1.6\times 10^{-13}~\text{J}\)
3. \(4.8\times 10^{-13}~\text{J}\)
4. \(6.4\times 10^{-13}~\text{J}\)

Subtopic:  Mass-Energy Equivalent |
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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 |
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