An alternating emf of frequency 50Hz is applied to a series LCR circuit of resistance 20Ω , an inductance of 100mH and a capacitor of 30mF. The correct statement of the following is

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current leads applied emf

current lags emf

current and emf are in the same phase

The difference between inductive and capacitive reactance is 50Ω

answer is B.

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Detailed Solution

n = 50Hz ω = 100πLω = 100×10−3×100π = 10π1Cω = 130×10−3×100π = 13πLω > 1Cω VL >VCSo voltage leads the current

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