We know that, Energy = Power × time

Here, Power = 1500 W

Time = 10 hours = (10 × 60 × 60) seconds = 36,000 seconds

Therefore,

The energy used by heater = Power × time

= 1500 × 36,000 J

= 5,40,00,000 J

= 5.4 × 10^{7} J

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## Question

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

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- work and energy CBSE Class 9

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We know that, Energy = Power × time

Here, Power = 1500 W

Time = 10 hours = (10 × 60 × 60) seconds = 36,000 seconds

Therefore,

The energy used by heater = Power × time

= 1500 × 36,000 J

= 5,40,00,000 J

= 5.4 × 10^{7} J

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