RC transients practice problems
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Read the RC-transient class notes.

For the circuit shown,

• R = 6.8 kΩ
• C = 15 nF

For the RC circuit, the source voltage has been at an initial voltage of V_i = 13 V for a long time. At t = 0, the source voltage abruptly drops to V_f = 4 V.

Determine the expression for the capacitor voltage as a function of time, for t > 0.

Calculate the time when the capacitor voltage will be equal to 8.5 V and calculate the capacitor current at that time.

Answer