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1. A series LCR circuit consisting of R = 20 Ω, | XL | = 20 Ω and | XC | = 20 Ω, connected across an A.C. supply of 200 V rms. The rms voltage across the capacitor is
(A): 100 ∠ -45
(B): 100 ∠ 45
(C): 400 ∠ +90°
(D): 400 ∠ -90°
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