In Section 10.2.4 we showed that the equation governing the current flowing in a series LRC electrical circuit is (equation (10.9))

Show, by a similar method, that the equation governing the current flowing in a series LR circuit containing a voltage source E is

At time t = 0 a switch is closed applying a d.c. potential of V to an initially quiescent series LR circuit consisting of an inductor L and a resistor R. Show that the current flowing in the circuit is

and hence find the time needed for the current to reach 95% of its final value.

Transcribed Image Text:

di di + R + d12 dt 1 C = 0