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The source of energy of the sun is:

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Nuclear fission
Nuclear fusion
Chemical reaction
None of these

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detailed solution

Correct option is B

  • Every star in the universe, including the sun, is alive due to nuclear fusion. It is through this process that they produce an enormous amount of heat and energy. 
  • The pressure at the core of the sun is tremendously high, and that is where the nuclear fusion reaction occurs.
  • Around 600 million tons of hydrogen are converted into Helium every second in the sun. 

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