A circuit consists of a 10-mH coil,a 9.0-V battery,a parallel combination of a 12-W resistor and a 6.0-W resistor,and a switch,all in series.What is the time constant of this circuit? A)9.0 x 10^-2 s B)2.5 x 10^-3 s C)5.6 x 10^-4 s D)This circuit has 2 time constants.

Question

Quizplus · Accepted Answer

The time constant for an RL circuit is given by τ = L/R, where L is the inductance and R is the equivalent resistance. The equivalent resistance of the parallel resistors is 4 ohms, so τ = 10 mH / 4 ohms = 2.5 x 10^-3 s.

A Circuit Consists of a 10-MH Coil,a 9