Electrical energy

Question

The question is " What is the value in KWh for a 300W lamp in 40 minutes? The ans for this question is 0.2kWh but i couldn't do it.

Answer 1

Hey Ramless, a300 w lamp on for 40 min will consume (3000/1000)X(40/60)= .2 kwhr. The key is to convert watts to kilowatts and minutes to hours because we want the answer to be in Kwh.

Regards

Jim