An RL series circuit has the following components: 5.0-mH coil,1.0-W resistor,12-V battery,ammeter and switch.What is the time constant of this circuit? A)12 x 10^-3 s B)5.0 x 10^-3 s C)2.5 x 10^-2 s D)200 s

Question

Quizplus · Accepted Answer

The time constant (τ) of an RL circuit is given by the formula τ = L/R, where L is the inductance in henrys, and R is the resistance in ohms. In this circuit, L = 5.0 mH = 5.0 x 10^-3 H, and R = 1.0 W. Therefore,

τ = L/R = (5.0 x 10^-3 H)/(1.0 W) = 5.0 x 10^-3 s = 5.0 x 10^-3 x 10^3 μs = 5.0 x 10^-3 x 10^3 x 10^3 ns = 5.0 x 10^3 ns = 5.0 μs

So the correct answer is B, 5.0 x 10^-3 s.

An RL Series Circuit Has the Following Components: 5