Q7.20 (a) A series LCR circuit with , , is connected to a variable frequency supply.
What is the source frequency for which current amplitude is maximum. Obtain this maximum value.
The inductance of the inductor
The capacitance of the capacitor
The resistance of the resistor
Frequency of voltage supply
As we know,
the current amplitude is maximum at the natural frequency of oscillation, which is
Also, at this frequency,
The maximum current in the circuit :
Hence maximum current is 14.14A.