The order of temperature required for thermonuclear fusion to take place is:

$10^{4} K$

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$10^{5} K$

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$10^{6} K$

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$10^{7} K$

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Solution

The correct option is D
$10^{7} K$

Very high temperatures are required to overcome the electrical repulsion that occurs between protons(Coulombic forces). The temperature required is in the order of $10^{7} K$ .

The temperature at the core of the sun where fusion takes place is 14 million Kelvin.

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