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RC Circuit

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An initially uncharged 10-mF capacitor is charged by a 10-V battery through a resistance R. The capacitor reaches a potential difference of 4 V in a period of 3 s after the charging began. Find the value of R.

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Given an RL circuit, find the rms voltage and current.

7. An RL circuit consists of a resistor R = 63 ohms , an inductor, L = 45 mH, and an ac generator with a rms voltage of 120 V.

(a) At what frequency will the rms current in this circuit be 1.5 A?

(b) For this frequency, what is the rms voltage across the resistor, Vrms,R?

(c) For this frequency, what is the rms voltage across the inductor, Vrms,L?

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