Question

_________ the resonant frequency, the current in the inductor lags the voltage in a series RLC circuit.

(a) Above

(b) Below

(c) Equal to

(d) Depends on the circuit

The question was asked in my homework.

My question is based upon The Current in a Series RLC Circuit in portion Resonance in AC Circuits of Basic Electrical Engineering

Answer 1

Right option is (a) Above

For explanation: The current in the inductor lags the voltage in a series RLC circuit if a circuit is inductive dominant i.e. if XL > XC

ωL > 1/ωC   => ω > 1/√LC  => ω > ω0.

So, the current in the inductor lags the voltage in a series RLC circuit above the resonant frequency.