Question

An electric heater is rated 500w how much energy does it use in 20 hoursAn electric heater is rated 500w how much energy does it use in 20 hours

Answer 1

Answer:

Time for which the heater is used t=10 hours =10×3600 s =36000 s

Energy consumed by the heater E=P×t where P is the power of the heater

∴ E=(1500) W ×36000 s

⟹E=5.4×10

7

J

E=15 kWh (∵1kWh=3.6×10

6

J)

Explanation:

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