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25. In the circuit of Figure P27.25, the switch S has been open for a long time. It is then suddenly closed. Take Ɛ = 10.0 V, R, = 50.0 kN, R, = 100 kN, and C= 10.0 µF. Determine the time constant (a) before the switch is closed and (b) after V the switch is closed. (c) Let the switch be closed at t = 0. Determine the current in the switch as a function of time. R1 S R2 Figure P27.25 Problems 25 and 26. +

25. In the circuit of Figure P27.25, the switch S has been open for a long time. It is then suddenly closed. Take Ɛ = 10.0 V, R, = 50.0 kN, R, = 100 kN, and C= 10.0 µF. Determine the time constant (a) before the switch is closed and (b) after V the switch is closed. (c) Let the switch be closed at t = 0. Determine the current in the switch as a function of time. R1 S R2 Figure P27.25 Problems 25 and 26. +

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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25. In the circuit of Figure P27.25, the switch S has been open for a long time. It is then suddenly closed. Take Ɛ = 10.0 V, R, = 50.0 kN, R, = 100 kN, and C= 10.0 µF. Determine the time constant (a) before the switch is closed and (b) after V the switch is closed. (c) Let the switch be closed at t = 0. Determine the current in the switch as a function of time. R1 S R2 Figure P27.25 Problems 25 and 26. 26. In the circuit of Figure P27.25, the switch S has been open S for a long time. It is then suddenly closed. Determine the time constant (a) before the switch is closed and (b) after the switch is closed. (c) Let the switch be closed at t = 0. Determine the current in the switch as a function of time. +
Transcribed Image Text:25. In the circuit of Figure P27.25, the switch S has been open for a long time. It is then suddenly closed. Take Ɛ = 10.0 V, R, = 50.0 kN, R, = 100 kN, and C= 10.0 µF. Determine the time constant (a) before the switch is closed and (b) after V the switch is closed. (c) Let the switch be closed at t = 0. Determine the current in the switch as a function of time. R1 S R2 Figure P27.25 Problems 25 and 26. 26. In the circuit of Figure P27.25, the switch S has been open S for a long time. It is then suddenly closed. Determine the time constant (a) before the switch is closed and (b) after the switch is closed. (c) Let the switch be closed at t = 0. Determine the current in the switch as a function of time. +
22. For the circuit shown in Figure P27.22, we wish to find the GP currents I,, I,, and I̟. Use Kirchhoff's rules to obtain equa- QIC tions for (a) the upper loop, (b) the lower loop, and (c) the junction on the left side. In each case, suppress units for clarity and simplify, combining the terms. (d) Solve the junction equation for I,. (e) Using the equation found in part (d), eliminate I, from the equation found in part (b). (f) Solve the equa- tions found in parts 18.0 V 5.00 N + (a) and (e) simulta- neously for the two unknowns I, and I,. 8.00N (g) 12.0 V Substitute the 11.0 N 7.00 N + answers found in part (f) into the junc- tion equation found in part (d), solving for I. (h) What is the significance of the negative answer for I,? 5.00 N I 36.0 V Figure P27.22
Transcribed Image Text:22. For the circuit shown in Figure P27.22, we wish to find the GP currents I,, I,, and I̟. Use Kirchhoff's rules to obtain equa- QIC tions for (a) the upper loop, (b) the lower loop, and (c) the junction on the left side. In each case, suppress units for clarity and simplify, combining the terms. (d) Solve the junction equation for I,. (e) Using the equation found in part (d), eliminate I, from the equation found in part (b). (f) Solve the equa- tions found in parts 18.0 V 5.00 N + (a) and (e) simulta- neously for the two unknowns I, and I,. 8.00N (g) 12.0 V Substitute the 11.0 N 7.00 N + answers found in part (f) into the junc- tion equation found in part (d), solving for I. (h) What is the significance of the negative answer for I,? 5.00 N I 36.0 V Figure P27.22
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