If you have a bulb that says "100 Watts", then how much energy (joules) is it using every second?

Question

a)25
b)50
c)75
d)100
e)250

Answer 1

The definition of a watt is a joule per second. 100 watts is 100 joules per second. Therefore, the light bulb emits 100 joules in 1 second, so the correct answer is d).

Answer 2

1 Watt = 1 joule/1second
The correct answer is d), 100 joules.