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Capacitor Discharge Calculation

For circuit parameters:

R = Ω, V0 =  V

C = μF, RC =  s = time constant.

This circuit will have a maximum current of Imax = A

just after the switch is closed.

The charge will start at its maximum value Qmax= μC.

At time t =  s= RC

the current is = Imax =  A,

the capacitor voltage is = V0 =  V,

and the charge on the capacitor is = Qmax = μC

Capacitor discharge derivation

Capacitor charging discussion