Fusion reaction takes place at high temperatu | vedclass

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(D) In a nuclear fusion reaction,two lighter nuclei combine to form a heavier nucleus.Since all nuclei are positively charged,there exists a strong el

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Kinetic energy is high enough to overcome the coulomb repulsion between nuclei

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(D) In a nuclear fusion reaction,two lighter nuclei combine to form a heavier nucleus.Since all nuclei are positively charged,there exists a strong electrostatic (Coulomb) repulsion between them.To overcome this repulsive force and bring the nuclei close enough for the strong nuclear force to take over,they must possess very high kinetic energy.This high kinetic energy is achieved at extremely high temperatures (on the order of $10^7$ to $10^8 \ K$),which is why fusion reactions are also known as thermonuclear reactions.

Fusion reaction takes place at high temperature because

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