Question

Aprproximately how much electrical energy does a 5-W lightbulb convert to radiant and thermal energy in one hour

Answer 1

Energy, E = 18 kJ

Step-by-step explanation:

Given that,

Power of the lightbulb, P = 5 W

We need to find the electrical energy produced by the lightbulb in one hour. We know that electric power is given by the electrical energy produced per unit time.

1 hour = 3600 seconds

Electric power :

`P=(E)/(t)\\\\E=P* t\\\\E=5\ W* 3600\ s\\\\E=18000\ J`

or

E = 18 kJ

So, 18 kJ of electrical energy a 5-W lightbulb convert to radiant and thermal energy in one hour.