A resistor and an inductor are connected in series to a battery. The time constant for the circuit represents the time required for the current to reach
A)25% of the maximum current.
B)37% of the maximum current.
C)50% of the original value.
D)63% of the maximum current.
E)75% of the maximum current.

Question

Quizplus · Accepted Answer

The time constant in an RL circuit is the time it takes for the current to reach approximately 63% of its maximum value after the circuit is closed.

A Resistor and an Inductor Are Connected in Series to a Battery