Alternating CurrentHard
Question
An alternating e.m.f of frequency 
is applied to a series LCR circuit. For this frequency of the applied e.m.f.
is applied to a series LCR circuit. For this frequency of the applied e.m.f.Options
A.The circuit is at not at resonance and its impedance is made up only of a reactive part
B.The current in the circuit is out of phase with the applied e.m.f. and the voltage across R equals this applied e.m.f.
C.The sum of the p.d.′s across the inductance and capacitance equals the applied e.m.f. which is 180o ahead of phase of the current in the circuit.
D.The quality factor of the circuit is ωL/R or 1/ωCR and this a measure of the voltage magnification (produced by the circuit at resonance) as well as the sharpness of resonance of the circuit.
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