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5) (15) P4.18. Consider the circuit shown in Figure P4.18. Prior to t0, 100 V, and v20. a. Immediately after the switch is closed, what is the value of the current [i.e., what is the value of i(0+)]? b. Write the KVL equation for the circuit in terms of the current and initial voltages. Take the derivative to obtain a differential equation. c. What is the value of the time constant in this circuit? d. Find an expression for the current as a function of time. e. Find the value that v2 approaches as t becomes very large. R-200 kΩ i(t) C2 Figure P4.18

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5) (15) P4.18. Consider the circuit shown in Figure P4.18. Prior to t0, 100 V, and...
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