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1. A resistor of 4 kilo-ohms is connected in series to a 12 micro-farad capacitor and...

1.

A resistor of 4 kilo-ohms is connected in series to a 12 micro-farad capacitor and a 40 volt battery. What is the voltage across the capacitor after one time constant?

1B.

A resistor of 4 kilo-ohms is connected to a 12 micro-farad capacitor. The initial charge in the capacitor is 40 micro-coulombs. What is the initial voltage across the capacitor?

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