Problem a series combination has a battery v 18v a switch, Ask an Expert

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Problem: A series combination has a battery (V = 18V), a switch (initially open), a resistor (R = 450 ), and a capacitor (C = 22.0 F). When the switch is closed a clock is started (t = 0.0 sec).

Part A: Determine the time constant for the circuit. Sketch a voltage on the capacitor, VC, versus time.

Part B: Calculate the capacitor voltage after two time constants have elapsed. Sketch the voltage on the resistor, VR, versus time.

Part C: Calculate the resistor voltage after two time constants have elapsed.

I want help to calculate the capacitor voltage after two time constants have elapsed.

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