An electrical appliance of $500 W$ is used for $2$ hours per day. Calculate the energy consumed in a day.
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Solution

The correct option is A 1
Given,
Power of appliance, $P = 500 W = 0.5 k W$
Time used, $t = 2 h r s$
We know,
Energy $= P o w e r \times t i m e t a k e n$
$= 0.5 k W \times 2 h$
$= 1 k W h$

$∴$ The energy consumed by the appliance in a day is $1 k W h$ .

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