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7. A 24 Ω resistor, an inductor with a reactance of 120 Ω, and a capacitor with a reactance of 120 Ω are in series across a 60 V source. The circuit is at resonance. The voltage across the inductor is ________.
(a) 60 V
(b) 660 V
(c) 30 V
(d) 300 V
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