Switch a in the circuit shown has been open for a long time, and switch b has been closed for a long time. Switch a is closed at t = 0 and, after remaining closed for 1 s, is opened again. Switch b is opened simultaneously, and both switches remain open indefinitely. Determine the expression for the inductor current i that is valid when (a) 0 sis1s and (b) t z 1 s. 7.8 t = 1 8 A t = 1 20 0.8 N 9Ω t = 0 2 H3i 30 10 V 30

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter6: Power Flows
Section: Chapter Questions
Problem 6.27P
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Switch a in the circuit shown has been open for
a long time, and switch b has been closed for a
long time. Switch a is closed at t = 0 and, after
remaining closed for 1 s, is opened again.
Switch b is opened simultaneously, and both
switches remain open indefinitely. Determine
the expression for the inductor current i that is
valid when (a) 0 sis1s and (b) t z 1 s.
7.8
t = 1
8 A
t = 1
0.8 0
20
t = 0
2 H3i 303
10 V 30
6Ωξ
Transcribed Image Text:Switch a in the circuit shown has been open for a long time, and switch b has been closed for a long time. Switch a is closed at t = 0 and, after remaining closed for 1 s, is opened again. Switch b is opened simultaneously, and both switches remain open indefinitely. Determine the expression for the inductor current i that is valid when (a) 0 sis1s and (b) t z 1 s. 7.8 t = 1 8 A t = 1 0.8 0 20 t = 0 2 H3i 303 10 V 30 6Ωξ
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