Question

A tub light consumes 2000 J of electrical energy in 20 seconds ? what is its power ?

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Answer 1

Answer:

Power=Energy/Time

Energy= 2000J

1Kw=1000W

Therefore Energy=2000/1000=2kw

Time= 20secs

1min=60.secs

1hr=60 mins

Therefore Time=0.00556hrs

Therefore, power=2/0.00556=359.71 KwHr

Answer 2

1. Work done = 2000 J
2. Time = 20 s
3. Power = ?

P = W/t

P = 2000/20

P = 100 watts

Here power is 100 watts.