An 10.0-$\Omega$ resistor is dissipating 100 watts. What are the current through it and the difference of potential across it?
A) 31.6 A, 3.16 V
B) 10.0 A, 3.16 V
C) 3.16 A, 31.6 V
D) 3.16 A, 10.0 V

Question

Quizplus · Accepted Answer

The power dissipated by a resistor is given by P = I^2 * R. Solving for I gives I = sqrt(P/R) = sqrt(100/10) = 3.16 A. The potential difference V = I * R = 3.16 * 10 = 31.6 V.

An 100- Ω\OmegaΩ Resistor Is Dissipating 100 Watts

An 100- $\Omega$ Resistor Is Dissipating 100 Watts