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Question

Which one of the following is not the unit of energy?


A
joule
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B
newton metre
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C
kilowatt
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D
kilowatt hour
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Solution

The correct option is B kilowatt
  • As Watt is unit of power, so kilowatt is also the unit of power.
  • As Work done = Force $$\times$$ Distance = Newton - metre, Therefore it is the unit of Work or Energy.
  • Energy = Power $$\times$$ time = kilowatt - hour, in fact it is the commercial unit of Energy.

$$\text{Hence the correct answer is option C.}$$

Physics

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