Question

g A series circuit contains a 1.0-k Ω resistor, a 5.0-mH inductor, and an ideal 25-V power supply. What is the time constant for the circuit?

Answer 1

Hi there!

Recall the equation for an LR circuit time-constant:

`\tau = (L)/(R)`

L = Inductance (H)

R = Resistance (Ω)

Plug in the given values.

`\tau = (0.005)/(1000) = 0.000005 s = \boxed{\text{5 } \mu s}`