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>>Class 11
>>Physics
>>Work, Energy and Power
>>Introduction to Work
>> $How many joules are there in one kilowat$

Question

How many joules are there in one kilowatt hour?

A

$35 \times 1 0^{6}$ J

B

$3.5 \times 1 0^{6}$ J

C

$36 \times 1 0^{6}$ J

D

$3.6 \times 1 0^{6}$ J

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Updated on : 2022-09-05

Solution

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Correct option is D)

As, $1 k W = 1000 W; 1 h r = 3600 s$
$1 k W h = 1000 W h = 3600000 = 3.6 \times 1 0^{6} W s = 3.6 \times 1 0^{6} J$

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