A series circuit contains a 12-V battery,a 2.0-W resistor,and a 3.0-mH inductor.If the switch to the battery is closed at t = 0,find the time required for the current in the circuit to reach 63% of its final value.
A)1.5 ms
B)3.0 ms
C)4.0 ms
D)5.0 ms

Question

Quizplus · Accepted Answer

Explanation:The time constant for the circuit is L/R = 3.0 mH / 2.0 W = 1.5 ms. The current in the circuit will reach 63% of its final value after one time constant, which is 1.5 ms.

A Series Circuit Contains a 12-V Battery,a 2