The energy used by a 1.5kw heater in 5 minutes is:
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Energy = power × time
Here given Power = 1.5kW = 1.5 × 10³ W
Time taken = 5 minutes = 5 × 60 sec = 300 sec
∴energy = 1.5 × 10³ × 300 = 4.5 × 10⁵ J
Hence energy used by heater = 4.5 × 10⁵J
Here given Power = 1.5kW = 1.5 × 10³ W
Time taken = 5 minutes = 5 × 60 sec = 300 sec
∴energy = 1.5 × 10³ × 300 = 4.5 × 10⁵ J
Hence energy used by heater = 4.5 × 10⁵J
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