A power line with a resistance of 2 ohms carries a current of 80 A. The power dissipated in the line is
A)40 W.
B)160 W.
C)320 W.
D)12,800 W.
E)none of the above

Question

Quizplus · Accepted Answer

The power dissipated in the line can be calculated using the formula $P = I^2R$, where $P$ is the power in watts, $I$ is the current in amperes, and $R$ is the resistance in ohms. Substituting the given values, $P = (80)^2 \times 2 = 6400 \times 2 = 12,800$ W.

A Power Line with a Resistance of 2 Ohms Carries