7.36 After the switch in the circuit of Fig. P7.36 has been open for a long time, it is closed at t = 0. Calculate (a) the initial value of i; (b) the final value of i; (c) the time constant fort 0; and (d) the numeri- cal expression for i(t) when t 2 0. 5 k2 4 kN 75 mH 20 kN +. 150 V 20 kng 20 kn30.5 mA( 40 kng Figure P7.36

Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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7.36 After the switch in the circuit of Fig. P7.36 has been
open for a long time, it is closed at t = 0. Calculate
(a) the initial value of i; (b) the final value of i;
(c) the time constant for t 0; and (d) the numeri-
cal expression for i(t) when t 2 0.
5 k2
4 k.
75 mH
20 kN
20 kn30.5 mA
20 kng
1 = (0-
40 kng
150 V
Figure P7.36
P 7.36 [a] For t <0, calculate the Thévenin equivalent for the circuit to the left and
right of the 75 mH inductor. We get
8kQ
75mH 15k2
Transcribed Image Text:7.36 After the switch in the circuit of Fig. P7.36 has been open for a long time, it is closed at t = 0. Calculate (a) the initial value of i; (b) the final value of i; (c) the time constant for t 0; and (d) the numeri- cal expression for i(t) when t 2 0. 5 k2 4 k. 75 mH 20 kN 20 kn30.5 mA 20 kng 1 = (0- 40 kng 150 V Figure P7.36 P 7.36 [a] For t <0, calculate the Thévenin equivalent for the circuit to the left and right of the 75 mH inductor. We get 8kQ 75mH 15k2
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