A. Just after the switch is closed, what is the current through the resistor 20.

ID: 1338749 • Letter: A

Question

A. Just after the switch is closed, what is the current through the resistor 20.0??

B. After the switch has been closed a long time, what is the current through the resistor 30.0??

C. After the switch has been closed a long time, what is the current through the resistor 20.0??

D. After S has been closed a long time, it is opened again. Just after it is opened, what is the current through the 20.0? resistor?

Problem 21.72 Consider the circuit in the figure (Figure 1) Figure 1 of 1 60.0 V 20.0 30.0 200.0 mH

A) just after switch is closed ,the circuit can not felt the influence of the Inductor

hence the potential drop across 20 ohm is 60 v = potential drop across 30 ohm

current through 20ohm is i = V/R = 60/20 = 3 A

B) Imax = V/R = 60/30 = 2 A

C) I = 0

D) I = 0

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