When the current through a resistor is increased by a factor of 4, the power dissipated by it
A) decreases by a factor of 4.
B) decreases by a factor of 16.
C) increases by a factor of 16.
D) increases by a factor of 4.
E) remain unchanged.

Question

Quizplus · Accepted Answer

The power dissipated by a resistor is given by P = I^2 * R. If the current is increased by a factor of 4, the power increases by a factor of 4^2 = 16.

When the Current Through a Resistor Is Increased by a Factor