An inductor with inductance L and a resistor with resistance R are wired in series to an ideal battery with emf .A switch in the circuit is closed at time t = 0, at which time the current is zero.A long time after the switch is thrown the potential differences across the inductor and resistor are:
A)0,
B), 0
C)/2, /2
D)(L/R), (R/L)
E)unknown since the rate of change of the current is not given

Question

Quizplus · Accepted Answer

A long time after the switch is closed, the current reaches a steady state, meaning the rate of change of current is zero. Therefore, the potential difference across the inductor is zero, and the entire emf is across the resistor.

An Inductor with Inductance L and a Resistor with Resistance