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Problem 7: The switch in the figure above on the left has been open for a long time. It is closed at t = 0 sec. Let's define the current through the R1 resistor as I1, let's define the current through the R2 resistor as I2, let's define the current through the R3 resistor as I3, and let's define the current through the capacitor C as I4. E = 18 V, R1 = 2.4 ?, R2 = 2 ?, R3 = 3 ?, and C = 4 ?F. (a) What are I1, I2, I3, and I4 at t = 0 sec, immediately after the switch is closed? Answer: I1 = I4 = 7.5 A and I2 = I3 = 0. (b) What are I1, I2, I3, and I4 after the switch has been closed a long time? Answer: I1 = 5 A, I2 = 3 A, I3 = 2 A, and I4 = 0 A. (c) What is Q on C after a long time. Answer: Q = 24 ?C. Problem 8: The switch in the figure above on the right has been open for a long time. It is closed at t = 0 sec. Let's define the current through the R1 resistor as I1, let's define the current through the R2 resistor as I2, let's define the current through the R3 resistor as I3, and let's define the current through the R4 resistor as I4. E = 25 V, R1 = 10 ?, R2 = 15 ?, R3 = 5 ?, and R4 = 10 ?. (a) What are I1, I2, I3, and I4 at t = 0 sec, immediately after the switch is closed? Answer: I1 = 1 A and I2 = I3 = I4 = 0 A. (b) What are I1, I2, I3, and I4 after the switch has been closed a long time? Answer: I1 = 1.96 A, I2 = 0.36 A, I3 = 1.07 A, and I4 = 0.54 A.

          Problem 7: The switch in the figure above on the left has been open for a long time. It is closed at t = 0 sec. Let's define the current through the R1 resistor as I1, let's define the current through the R2 resistor as I2, let's define the current through the R3 resistor as I3, and let's define the current through the capacitor C as I4. E = 18 V, R1 = 2.4 ?, R2 = 2 ?, R3 = 3 ?, and C = 4 ?F. (a) What are I1, I2, I3, and I4 at t = 0 sec, immediately after the switch is closed? Answer: I1 = I4 = 7.5 A and I2 = I3 = 0. (b) What are I1, I2, I3, and I4 after the switch has been closed a long time? Answer: I1 = 5 A, I2 = 3 A, I3 = 2 A, and I4 = 0 A. (c) What is Q on C after a long time. Answer: Q = 24 ?C.

Problem 8: The switch in the figure above on the right has been open for a long time. It is closed at t = 0 sec. Let's define the current through the R1 resistor as I1, let's define the current through the R2 resistor as I2, let's define the current through the R3 resistor as I3, and let's define the current through the R4 resistor as I4. E = 25 V, R1 = 10 ?, R2 = 15 ?, R3 = 5 ?, and R4 = 10 ?. (a) What are I1, I2, I3, and I4 at t = 0 sec, immediately after the switch is closed? Answer: I1 = 1 A and I2 = I3 = I4 = 0 A. (b) What are I1, I2, I3, and I4 after the switch has been closed a long time? Answer: I1 = 1.96 A, I2 = 0.36 A, I3 = 1.07 A, and I4 = 0.54 A.

Problem 7: The switch in the figure above on the left has been open for a long time. It is closed at t = 0 sec. Let's define the current through the R1 resistor as I1, let's define the current through the R2 resistor as I2, let's define the current through the R3 resistor as I3, and let's define the current through the capacitor C as I4. E = 18 V, R1 = 2.4 ?, R2 = 2 ?, R3 = 3 ?, and C = 4 ?F. (a) What are I1, I2, I3, and I4 at t = 0 sec, immediately after the switch is closed? Answer: I1 = I4 = 7.5 A and I2 = I3 = 0. (b) What are I1, I2, I3, and I4 after the switch has been closed a long time? Answer: I1 = 5 A, I2 = 3 A, I3 = 2 A, and I4 = 0 A. (c) What is Q on C after a long time. Answer: Q = 24 ?C.

Problem 8: The switch in the figure above on the right has been open for a long time. It is closed at t = 0 sec. Let's define the current through the R1 resistor as I1, let's define the current through the R2 resistor as I2, let's define the current through the R3 resistor as I3, and let's define the current through the R4 resistor as I4. E = 25 V, R1 = 10 ?, R2 = 15 ?, R3 = 5 ?, and R4 = 10 ?. (a) What are I1, I2, I3, and I4 at t = 0 sec, immediately after the switch is closed? Answer: I1 = 1 A and I2 = I3 = I4 = 0 A. (b) What are I1, I2, I3, and I4 after the switch has been closed a long time? Answer: I1 = 1.96 A, I2 = 0.36 A, I3 = 1.07 A, and I4 = 0.54 A.

Added by William P.

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