Assertion :Kilowatt hour is the unit of electric power. Reason: Watt hour has units of energy.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is incorrect but Reason is correct

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is incorrect but Reason is correct
Energy $E = P t$
where $P$ is the power and $t$ is the time of operation.
Since $P$ has unit watt and $t$ has a unit hour.
Thus watt-hour is the unit of energy.
Similarly, a kilowatt-hour is the unit of energy.
Thus Assertion is incorrect and Reason is correct.

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Similar questions

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Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.

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