PHYS 212 Lecture 16: 16.0

The switch in a RL circuit in which R=5.90, L=3.31 H, and E= 24.7 V is closed at t=0. (a) what is the maximum current in the circuit? (b) what is the current when t=t=L/R?

A multimeter in an RL circuit records an rms current of 0.200 A anda 70.0 Hz rms generator voltage of 100 V. A wattmeter shows thatthe average power delivered to the resistor is 8.0 W.
How do I find the inductance,L?

Consider an RL circuit, constitutedby the series ofa battery of voltage 12 V, a resistorof

R = 10, and an inductor of inductanceL.

(a) Draw the RL circuit;

(b) Describe qualitatively what happens tothecurrent i in the circuit after thebattery is

connected;

(c) Assume that the inductive time constantL=1second. Find the value of the currenti at

times t = 1 secondand t = 5 second.