Answer: a) Use component values from Appendix H to create a first-order RC circuit (see

Chapter 7, Problem 7.59

(choose chapter or problem)

a) Use component values from Appendix H to create a first-order RC circuit (see Fig. 7.21) with a time constant of 250 ms. Use a single capacitor and a network of resistors, if necessary. Draw your circuit.

b) Suppose the capacitor you chose in part (a) has an initial voltage drop of 100 V. At t = 0, a switch connects a current source with a value of 1 mA in parallel with the capacitor and equivalent resistance. Write an expression for the voltage drop across the capacitor for \(t \geq 0\).

c) Using your result from part (b), calculate the time at which the voltage drop across the capicitor reaches 50 V.

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