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>>Class 11
>>Physics
>>Work, Energy and Power
>>Introduction to Work
>> $Number of kilowatt - hours = volt \times amp$

Question

Number of kilowatt-hours = $\frac{v o l t \times a m p e r e \times . . . . . . . . . . .}{1 0 0 0}$

A

time in seconds

B

time in minutes

C

time in hours

D

time in days

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Updated on : 2022-09-05

Solution

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Correct option is C)

Power, $P = V I$
1 kilowatt-hour means $P = 1 k W = 1000 W$ and time $t = 1 h o u r$
As kWh is the unit of electrical energy so $1 k W h = V I t / 1000$ .
Thus, time will be in hour.

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