From the following, the biggest unit of energy is?

Joule

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Kilowatt hour

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Erg

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Electron volt

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Solution

The correct option is A Kilowatt hour
Since, we know that SI unit of energy is represented by Joule. Hence, let us convert all the different units in the form of Joules.

$1 J o u l e = 1 J o u l e$

$1 K w h = 3600000 J o u l e$

$1 e r g = 10^{- 7} J o u l e$

$1 e V = 1.6 \times 10^{- 19} J o u l e$

Hence, Kilowatt hour is the largest unit of energy and hence it is practically used in everyday life of electric consumption.

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