Question

an electric heater is rated 2500w how much energy does it use in 15 hr ​

Answer 1

Answer:

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Step-by-step explanation:

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)