JAMB - Physics (2022 - No. 19)
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?
2400 J
9600 J
1500 J
1200 J
解释
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