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If an electric heater is rated at $1500 W$ is used for $10 h$ the amount of energy consumed will be ____ $\times 10^{7} J$ .

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Detailed Solution

If an electric heater rated at

1500 W

is used for

10 h

the amount of energy consumed will be

5.4 \times 10^{7} J

.
Given:
Power rating of the electric heater =

1500

W
Time of use =

10

h
⇒ =

10 \times 60 \times 60

\Rightarrow = 36000 \sec

We know that;

Power = \frac{work done or energy consumed}{Time}

Energy consumed by an electric heater if it is used for

10 h =

the Power rating of the heater (in watt)

\times

Time for which it is used (in sec)

\Rightarrow = 1500 \times 36000

⇒

= 54, 000, 000

⇒

= 5.4 \times 1 0^{7}

J

Therefore, an electric heater rated at

1500 W

when used for

10 h

will consume

5.4 \times 1 0^{7}

J

energy.

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