A) In LCR series AC circuit, as the frequency of the source increases, the impedance of the circuit first decreases and then increases
B) If the net reactance of an LCR series AC circuit is same as its resistance, then the current lags behind the voltage by\[45{}^\circ \]
C) At resonance, the impedance of an AC circuit becomes purely resistive
D) At resonance in LCR series AC circuit, the potential drops across inductor and capacitor are equal in magnitude but opposite in sign
E) Below resonance, voltage leads the current while above it, current leads the voltage
Correct Answer: D
Solution :
When resonance occurs emf£ and current\[i\] are in phase. In this case, the impedance is minimum and current is maximum. At resonance inductive reactance is equal to capacitive reactance \[{{X}_{L}}={{X}_{C}}\]
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