An alternating EMF of frequency `(1)/(2pi sqrt(LC))` is applied to a series LCR circuit. For this frequency of the applied EMF,

Options

A. The circuit is at resonance and its impedance is made up only of a reactive part
B. the current in the circuit is in phase with the applied EMF and the voltage across R not equal this applied EMF potential differences
C. the sum of the potential difference across the inductance and capacitance equals the applied EMF which is `180^(@)` ahead of phase of the circuit in the circuit
D. the quality factor of the circuit is `omegaL//R` or `1//omegaCR` and this is a measure of the voltage magnification (produced by the circuit at resonance) as well as sharpness of resonance of the circuit

Answer

D

Explanation

circuit is at Resonance so impedence is only resistive is B and D