Question -
A resistor R, an inductor L and a capacitor C are connected in series to an oscillator of frequency n. If the resonant frequency is , then the current lags behind voltage, when
Options:
A .  n = 0
B .  n
C .  n= nr
D .  n> nr
Answer: Option D : D The current will lag behind the voltage when reactance of inductance is more than the reactance of condenser. Thus, ωL>1wCor ω>1√LC or n>12π√LCor n>nrwhere nr= resonant frequency
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