An LC circuit `(L = 0.01H, C = 1muF)` is connected to an AC source of variable frequency. If the frequency is varied from 1 kHz, then show the consequent variation of impedance by a rough sketch.

A series LCR circuit is connected to an ac source of variable frequency. When the frequency is increased continuously, starting from a small value, the power factor

A series LCR- circuit with L=0.12 H C=4.8xx10^(-7)F,R=23Omega is connected to a variable frequency supply At what frequency is the current maximum ?

(a) In a series LCR circuit connected across an AC source of variable frequency, obtain the expression for its impedance and draw a plot showing its variation with frequency of the AC source. (b) What is the phase difference between the voltages across inductor and the capacitor at resonance in the LCR circuit ? (c ) When and inductor is connected to a 200 V DC voltage, a current of 1Aflows trough it. when the same inductor is connected to a 200 V, 50 Hz AC source, only 0.5 A current flows. Explain, why ? Also, calculate the self inductance of the inductor.

An LCR series circuit contains L = 8 H, C = 0.5 muF and R =100 Omega The resonant frequency of the circuit is .

In a LC circuit parallel combination of inductance of 0.01H and a capacitor of 1muF is connected to a variable frequency alternating current source. Draw a rough sketch of the current variation as the frequency is changed from 1kHz to 3kHz.

A series LCR circuit with R=22Omega, L=1.5 H and C=40 mu F is connected to a variable frequency 220 V ac supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle?

An LC- circuit (inductance 0.01 H and capacitance 1 muF ) is connected to a variable a.c. source as shown in fig. 14.8. Draw rough sketch of the current -variation as the frequency is changed from 1 kHz to 2 kHz.