A current of 0.5 A flows through a resistor when connected to a 40 V
PHYSICS
JAMB 2022
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: 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
Energy = 2,400J
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