The energy given out by a 60watt bulb in 30 minutes is a)900joule b)30watt hour c)1108000j?

1 Answer
Jan 17, 2018

The answer is option (b)=30Wh

Explanation:

The energy is

"Energy(J)"="Power(W)"xx "Time(s)"

E=Pxxt

The power is P=60W

The time is t=30xx60=1800s

The energy is

E=60xx1800=108000J

Energy is also,

E=60xx(30/60)=30Wh