A variable frequency a.c. source is connected to a capacitor. How will the displacement current change with decrease in frequency.

A variable-frequency a.c. source is connected to a capacitor.Will the displacement current increases or decreases with increases in frequency?

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.

Explain why the reactance provided by a capacitor to an alternating current decreases with increasing frequency.

An electric lamp connected in series with a variable capacitor and an a.c. source is glowing with some brightness. How will the brightness change on increasing the value of capacitance and why?

A coil has resistance 30 ohm and inductive reactance 20 ohm at 50 Hz frequency. If an a.c. source of 200 V, 100 hz is connected across the coil, the current in the coil? Find the current of the coil

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?

An a.c. source of angular frequency omega is fed across a resistor R and a capacitor C in series. The current registered is I. If you the frequency of source is changed to omega//3 , maintaining the same voltage, current in the circuits is found to be halved. Caculate the ratio of reactance to resistance at the original frequency omega.