If the value of supply frequency is changed, we can observe that the value inductive reactance (X L) and capacitive reactance (X C) is also changed. The phenomena of resonant frequency used in the series circuit when the inductive reactance (X L) is equal to the capacitive reactance (X C). The resonant frequency is termed as the resonance frequency. Objects combine to form a system, this system can have more than one resonance frequency. If we pull back the pendulum and leave, it will swing out and return at its resonant frequency. In our daily life example of a resonant frequency is a pendulum. When an object is in equilibrium with acting forces and could keep vibrating for a long time under perfect conditions, this phenomenon is resonance. The circuit under resonance is purely resistive in nature and is termed as ‘resonant circuit’ or ‘tuned circuit’.Ī resonant frequency is the natural vibrating frequency of an object and denoted as ‘f’ with a subscript zero (f 0).

In this system, the phenomenon of cancellation of reactance when inductor and capacitor are in series or cancellation of susceptance when they are in parallel is termed as resonance. Resonance occurs in electrical systems when the system contains at least one inductor and one capacitor.

The resonant frequency is the frequency at which resonance happens. Resonance is the phenomenon at which natural frequency coincides with the driving force and gives the maximum response. If the frequency of the system driving force coincides with the natural frequency of oscillation, the system resonates or resonant frequency and the system gives the maximum response.

Any system that has at least a pair of complex conjugate poles has a natural frequency of oscillation.

How to use resonance