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An electric heater is rated $1500 W$ . How much energy does it consume in $10 hours$ ?

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1.5 kWh

15 kWh

150 kWh

150 kWh

answer is B.

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Detailed Solution

An electric heater is rated

1500 W

. It will consume

15 kWh

10 hours

.
The relation between power and energy is

Energy = Power \times Time

If, Power

= 1500 Watt

, Time

= 10 Hours

Then,

Power = \frac{1500}{1000}

= 1.5 kW

Energy used,

E = P \times t

\Rightarrow E = 1.5 kWh \times 10 h

\Rightarrow E = 15 kWh

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