Part A What is the current through the 20?resistor immediately after the switch

Question

Part A

What is the current through the 20?resistor immediately after the switch is closed?

Express your answer to two significant figures and include the appropriate units.

Part B

What is the current through the 20?resistor after the switch has been closed a long time?

Part C

What is the current through the 20?resistor immediately after the switch is reopened?

Express your answer to two significant figures and include the appropriate units.

ltem 17 Part A The switch in the figure has been open for a long time It is closed at t = 0 s What is the current through the 20 resistor immediately after the switch is closed? Figure 1) Express your answer to two significant figures and include the appropriate units HA Figure 1 of! ValueUnits Submit My Answers Give Up 10 Part B What is the current through the 20 resistor after the switch has been closed a long time? 30V- 20 2 10 mH Express your answer to two significant figures and include the appropriate units HA

Explanation / Answer

Here,

A)

just after closing the switch ,

the inductor behaves as open circuited

hence,

I(20) = 30/(Req)

I(20) = 30/(10 + 20)

I(20) = 1 A

the current in 20 Ohm resistance is 1 A

B)

Now , after a long time , the inductor behaves as short circuit,

I(20) = 0 A

the current in the 20 Ohm is 0 A

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