Series Resonance Circuit Lab Report. The resonance frequency is defined as the frequency at which the impedance of the circuit is purely real that is with zero reactance. At resonance the impedance of a branch with lc in series is equal to zero which is equivalent to a short and the admittance of a branch with lc in parallel is equal to zero which is equivalent to an open.
The voltage through an rlc series circuit will be measured as a function of frequency for a fixed applied voltage. The basic series resonant circuit is shown in fig. As the frequency of the source changes the maximum amplitude of the source voltage vm is held constant.
Therefore at the resonance frequency the current becomes maximum.
Of interest here in how the steady state amplitude and the phase angle of the current vary with the frequency of the sinusoidal voltage source. Find a new phenomena called resonance in the series rlc circuit. Kirchoff s loop rule for a rlc circuit the voltage vl across an inductor l is given by vl l 1 d dt i td where i t is the current which depends upon time t. The frequency for which the rms voltage attains a maximum value is the resonance frequency.
