P.4.

/202

ww

+32V

5mH

852

个 6A

The switch has been in position

□

for a long time befor t=o.

At t=0, it moves from D

to Ⓡ

a) Draw the circuits before and after t=0

b) Find the initial and the final currents through the

inductor.

c) Find the voltage across the 852 resistor

at t=of and at t→∞o./nNote: With all the problems, label the voltages and

currents

clearly

with polarity for your analysis.