In a series LCR circuit across an a.c source of variable frequency, obtain the expression for its impedance and draw a plot showing its variation with frequency of the a.c. source.

Draw the graph to show the variation of X_C with the frequency of the ac source used.

A bulb and a capacitor are connected in series to an a.c. source of variable frequency. How will the brightness of the bulb change on increasing the frequency of a.c. source?

Draw the graphs showing variations of inductive reactance and capative reactance with frequency of applied a.c. source.

The given circuit diagram shows a series LCR circuit connected to a variable frequency 230 V source. Obtain the impedacne of the circuit and the amplitude of current at resonating frequency.

In an LCR-series a.c. circuit, the current

Draw the graph showing the variation of reactance an inductor with the frequency of an a.c. circuit.