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

For the circuit shown,

• R₁ = 12 Ω
• R₂ = 15 Ω
• R₃ = 33 Ω
• C = 15 μF

In the RC circuit, the source voltage has been at an initial voltage of V_i = 7 V for a long time. At t = 0, the source voltage abruptly jumps to V_f = 27 V.

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

Answer