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Nuclear Fusion

The source of...

Question

The source of energy of the sun is ___

A

nuclear fission

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B

chemical reaction

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C

nuclear fusion

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D

photoelectric effect

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Solution

The correct option is C
nuclear fusion

Inside the sun, energy is generated due to the nuclear fusion of hydrogen nuclei into helium. Nuclear fusion is the source of Sun's energy. At the core where temperature and pressure are very high, hydrogen atoms fuse into helium atom and release energy in the form of Gamma rays.

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Similar questions

Q. Assertion :The nuclear fusion reaction releases less energy than the fission reaction. Reason: The nuclear fusion reaction takes place in the sun and other stars.

Q. Assertion (A): Nuclear fusion reactions are considered as thermo-nuclear reactions

Reason (R): The source of stellar energy is nuclear fusion

Q. A nuclear reaction, whether fission or fusion, releases a ____ amount of energy.

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 ?
(ii) for making a hydrogen bomb ?
(c) Which produces more energy : nuclear fusion or nuclear fission ?
(d) Calculate the energy released in joules when 5 g of a material is completely converted into energy during a nuclear reaction.
(e) How much is this energy in MeV ? (Speed of light = 3

\times 10^{8} m / s)

Nuclear fission reactions are not a source of energy for one of the following. This is :
(a) atom bomb (b) power plants (c) sun (d) pacemaker

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