Question

a) Plot currents through the capacitor and the inductance of a series RLC circuit at resonance on

the same graph as functions of time. (b) What is the phase difference between the current and the

total voltage at frequency   0 , such that current amplitude is Imax/√2 ?

Answer 1

The currents through the capacitor and the inductance of a series RLC circuit at resonance are equal and at their maximum.

The impedance is

$$Z=\sqrt{R^2+(X_L-X_C)^2}=R.$$

The phase shift at resonance frequency ω₀ is zero: