Answer:
Energy, E = 18 kJ
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 :
[tex]P=\dfrac{E}{t}\\\\E=P\times t\\\\E=5\ W\times 3600\ s\\\\E=18000\ J[/tex]
or
E = 18 kJ
So, 18 kJ of electrical energy a 5-W lightbulb convert to radiant and thermal energy in one hour.
