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Nuclear Fission

During a nucl...

Question

During a nuclear reaction, mass is lost. This results in :

A

a release of energy

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B

an increase in the speed of light

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C

a gain of energy

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D

a decrease in the speed of light

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E

no change in energy

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Solution

The correct option is A a release of energy
During a nuclear reaction, mass is lost. This results in a release of energy.
The lost mass is converted into energy. The energy released is obtained by Einstein's equation, $E = M c^{2}$ .

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Q. (a) Differentiate between nuclear fission and nuclear fusion.
(b) Which of the two, nuclear fission and nuclear fusion, is made use of :
(i) for the production of electricity ?
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For example, the mass of hydrogen atom is equal to the sum of the masses of a proton and an electron. For other atoms, the atomic mass is less than the sum of the masses of protons, neutrons and electrons present. This difference in mass, termed as mass defect, is a measure of the binding energy of protons and neutrons in the nucleus. The mass-energy relationship postulated by Einstein is expressed as:

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Δ E

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Δ m

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