एक प्रतिरोध \( R \), प्रेरकत्व \( L \) तथा संधारित्र \( C \), आवृत्ति \( f \) के दोलित्र के साथ ...

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एक प्रतिरोध \( R \), प्रेरकत्व \( L \) तथा संधारित्र \( C \), आवृत्ति \( f \) के दोलित्र के साथ श्रेणीक्रम में जोड़े गये हैं। यदि अनुनादी आवृत्ति \( f_{r} \) है, तब धारा वोल्टेज से पश्चगामी होगी, जब-
(A) \( f=0 \)
(B) \( f=f_{r} \)
(C) \( ff_{r} \)
(D) \( ff_{r} \)
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