7.8 Figure 7.17 shows a series LCR circuit connected to a variablefrequency 230 V source. L = 5.0 H,

12th NCERT Problems Solution in Detail - Alternating Current

7.8 Figure 7.17 shows a series LCR circuit connected to a variable
frequency 230 V source. L = 5.0 H, C = 80mF, R = 40 W.
(a) Determine the source frequency which drives the circuit in
resonance.
(b) Obtain the impedance of the circuit and the amplitude of current
at the resonating frequency.
(c) 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.