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Question: a 220f capacitor that is initially uncharged is connected in...

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A 2.20-μF capacitor that is initially uncharged is connected in series with a 7.5-Ω resistor and an emf source with VB = 15 V and negligible internal resistance. At the moment after the switch is closed, when the voltage difference across the resistor is (2/7) VB, what is the voltage difference across the capacitor in terms of VB?

The answer is 5/7 VB. Please explain how to reach this answer!

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