Suppose the frequency of the source in the previous example can be varied. (a) What is the frequency of the source at which resonance occurs? (b) Calculate the impedance, the current, and the power dissipated at the resonant condition.

Suppose the frequency of the source in the above example can be varied (a) What is the frequency of the source at which resonance occurs ? (b) Calculate the impedeance, the current and power dissipated at the resonant condition.

If the frequency of the source e.m.f. in an AC circuit in n ,the power varies with a frequency:

In a series LCR circuit, the frequency of the source is more than resonance frequency. The current in the circuit leads the voltage in phases(True/false).

Figure here, shows a series L-C-R circuit connected to a variable frequency 230 V source. L = 5.0H, C = 80 muF and r = 40 Omega (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 L-C combination is zero at the resonating frequency.

When the frequency of the AC source in an LCR circuit equals the resonant frequency, the reactance of the circuit is zero. Does it mean that there is no current through the inductor or the capacitor?

Answer the following: (a) What do you understand by 'sharpness of resonance' for a series LCR resonant circuit? How is it related with the quality factor 'Q' of the circuit? Using the graphs given in the diagram, explain the factors which affect it. For which graph is the resistance (R ) minimum? (b) A 2 muF capacitor, 100 Omega resistor and 8 H inductor are connected in series with an ac source. Find the frequency of the ac source for which the current drawn in the circuit is maximum. If the peak value of emf of the source is 200 V, calculate the (i) maximum current, and (ii) inductive and capacitive reactance of the circuit at resonance.

A series LCR circuit connected to a variable frequency 230 V source has L = 5.0 H, C = 80 mu F , R = 40 Omega , Fig. (a) Determine the source frequency which drives the circuit in resonance. (b) Obtain the impedance of the circuit and amplitude of current at at resonating frequency. (c ) Determine the r.m.s. potential drops acorss the three elements the circuits. Show that the potential drop acorss the LC combination is zero at the resonating frequecny.

For the series LCR circuit shown in the figure, what is the resonance frequency and the amplitude of the current at the resonating frequency

For the series LCR circuit shown in the figure, what is the resonance frequency and the amplitude of the current at the resonating frequency

Fig. shows series LCR circuit with L = 5.0 H, C = 80 mu F, R = 40 Omega connected to a variable frequency 240 V source. Calculate (i) the angular frequency of the source which drives the circuit at resonance. (ii) Current at the resonating frequency. (iii) the rms pot. drop across the capacitor at resonance.