Question

an electric heater is rated 2000w how much energy does it use in 10 minutes [find energy in commercial unit and si unit of energy] ​

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)

Answer 2

200

Explanation:

Power=Energy ×time

2000w= energy ×10

2000÷10=energy

200=energy