Lakhmir Singh & Manjit Kaur - Physics

Book: Lakhmir Singh & Manjit Kaur - Physics

Chapter: 3. Sources of Energy

Subject: Physics - Class 10th

Q. No. 18 of Short Answer Type Questions-Pg-157

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18

What is the source of energy of this sun and other stars?

The source of energy of this sun and other stars is nuclear fusion reactions of hydrogen. The net process is the fusion of four Hydrogen nuclei to make one helium nucleus plus some energy. The balance between gravity compression and outward thermal pressure controls the rate of the nuclear fusion reactions.


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