Question: A capacitor C = 120 pF is connected in series to a resistor R = 20 k and an emf of E = 9 V.

A capacitor C = 120 pF is connected in series to a resistor R = 20 k and an emf of E = 9 V. At time t = 0, the switch is closed. Draw the circuit and determine how long will it take for the capacitor to reach 80% of its full charge

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