What is resonance in series circuit?

What is resonance in series circuit?
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1 Answer

Answer :

If in an AC circuit inductive reactance XL and capacitive reactance XC is equal the voltage across both will be equal and are 180° out of phase. So that each will cancel each other and the current limiting component will be the resistance of the circuit.
If we are in a position to alter the frequency of supply voltage at a particular frequency named as ‘resonant frequency’, AC series circuit’s XL = XC and the net reactance will be zero. So the current in the circuit is in-phase with the voltage. Because the controlling component of the circuit is resistance only and the current is maximum and equal to V/R amps.
This above said condition is called ‘series resonance’ and the frequency at which it occurs is called resonant frequency and the resonant frequency (FR) is equal to (FR) = 1/2π√LC cycles per second.
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