Question

1. Calculate the power of a light bulb that uses 40J of electricity in 4 seconds.

Answer 1

Answer:

: 1 joule per second can be termed as one watt. So a lamb or a bulb which consumes 40 joules of energy in 4 second has a wattage

Answer 2

Power=P Work(in joule)=40J Time=4sec

P=W/t

P=40/4

P=10 Watt