An electric lamp marked 240V; 60W is left to operate for an hour. How much energy is generated by the filament?

A. 3.86 x 10⁵J
B. 3.56 x 10⁵J
C. 1.80 x 10⁴J
D. 2.16 x 10⁵J

Correct Answer:

Option D = 2.16 x 10⁵J

Explanation

Energy generated = power X time = 60w x 1h = 60 x 60 x 60 ws = 216000J = 2.16 x 10⁵J