^LC R parallel circuit or rejecter circuit
^LC R parallel circuit or rejecter circuit
Reciprocal of impedance Z is called admittance Y. Current delivered by the supply is I = I1 + I2
If the source oscillates at angular frequency 
then imaginary part of Y becomes zero & Y is minimum. This stage is called resonance. Following points are of interest at resonance.
1. The reciprocal of the minimum value of Y is called the parallel or dynamic resistance, it is 
2. Peak current through supply 
3. Peak current through 
4. Q – factor or current magnification i.e. the ratio of the peak current through supply to that through 
5. Used as transmitting circuits.
