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OpenStudy (anonymous):

A 4.0 μF capacitor is connected in series with a 2.0 kΩ resistor across a 20-V DC source and an open switch. If the switch is closed at t = 0 s, what is the charge on the capacitor at t = 9 ms?

OpenStudy (radar):

Depends on the initial charge of the 4.0uf capacitor. Assuming it is fully discharged use the RC time constant and calculate the voltage across the capacitor, the the charge.

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