A current of 0.5 A flows through a resistor when connected to a 40 V battery. How much energy is dispatched in 2 minutes?

A. 2400 J
B. 9600 J
C. 1500 J
D. 1200 J

Correct Answer:

Option A = 2400 J

Explanation

Energy = power x time

Power = voltage x current.

Energy = voltage x current x time

Energy = 40 x 0.5 x 60 x 2

→ 2,400j