Q7.11 Figure shows a series LCR circuit connected to a variable frequency source.
, , .
Determine the rms potential drops across the three elements of the circuit. Show that the potential drop across the LC combination is zero at the resonating frequency.
Potential difference across any element =
The potential difference across capacitor:
Potential difference across the inductor
The potential difference across Resistor
Potential difference across LC combination
Hence at resonating frequency potential difference across LC combination is zero.