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At time t = 0, an RC circuit consists of a 18.5-V emf device, a 68.0- resistor, and a 140.0-µF capacitor that is fully charged. The switch is thrown so that the
capacitor begins to discharge.
(a) What is the time constant of this circuit?
S
(b) How much charge is stored by the capacitor at t = 0.5T, 2T, and 4t?
q(t = 0.5T)
μC
=
q(t = 2T) =
q(t = 4t) =
=
5 5

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