Series Resonance: An RLC series circuit has R = 2 kohms, L = 10 mH, and C = 12.2 nF. What is the voltage across the capacitor when the circuit operates at the resonant frequency?

Answer: At resonance, the total impedance equals the value of the resistance, which is 2 kohms. With a source voltage of 15 V, the current is 7.5 mA. Since the capacitive reactance is 28.6 kohms, the capacitor voltage is 215 V.

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