A current of 2A passes through a wire of resistance 4\Omega for 3 minutes. Calculate the energy lost.
A
960J
B
1440J
C
2880J
D
48J
Verified Correct Answer: C.
Physical Principles & Numerical Solution
Power = current[I]\(^2\) * Resistance[R] → 2\(^2\) * 4 → 4 * 4 = 16watts
time = 3minutes → 3 * 60 = 180s
Energy = power * time → 16 * 180 = 2880j
Source: Myschool Past Questions Archive (Record #61918)