AC Voltage Applied to a Capacitor

Capacitor reactance is $\mathrm{Xc}$ in purely capacitive a.c circuit which is equal to 

Phaser $\overrightarrow{\mathrm{I}}$ makes with positive $\mathrm{x}-\mathrm{axis}$ ( if voltage phaser $\overrightarrow{\mathrm{E}}$ makes angle $\mathrm{\omega t}$ with positive $\mathrm{x}-\mathrm{axis}$ )

Phase difference between current and voltage in purely capacitive a.c circuit is 

The time constant of the circuit consisting capacitor $C$ and resistance $R$ is $RC$.

The phase difference between the alternating current and emf is $\frac{\pi }{2}$. Which of the following cannot be the constituent of the circuit ?

(a) $LC$

(b) $L$ alone

(c) $C$ alone

(d) $R,L$

As the frequency of an AC circuit increases, the current first increases and then decreases. What combination of circuit elements is most likely to comprise the circuit?

What is instantaneous power in purely capacitive circuit.

Instantaneous power is defined as the limiting value of the average power when time tends to zero.

Instantaneous power is defined as the limiting value of the average power when time tends to_____.

No power loss associated with pure capacitor in ac circuit.

The power consumed in a circuit element will be least when the phase difference in degree between the current and voltage is 

Why power in a circuit is zero in which current and voltage are $90°$ out of phase?

 When the supply frequency increases, what happens to the capacitive reactance in the circuit?

A capacitor has capacitance $C$ and reactance $X$. If capacitance and frequency becomes doubled, then reactance will be

Which of the following curves correctly represents the variation of capacitive reactance $X_C$ with frequency $f$?

Explain the term: Capacitive reactance.

Role of capacitor in a circuit-

A $60 \mathrm{\mu }\mathrm{F}\mathrm{ }$ capacitor is connected to a $110\mathrm{ }\mathrm{V}\mathrm{ }\left(\mathrm{r}\mathrm{m}\mathrm{s}\right),\mathrm{ }60\mathrm{ }\mathrm{H}\mathrm{z}\mathrm{ }$ ac supply. The rms value of current in the circuit is

A $30 \mathrm{\mu }\mathrm{F}\mathrm{ }$ capacitor is connected to a $150 \mathrm{V},\mathrm{ }60\mathrm{ }\mathrm{H}\mathrm{z}\mathrm{ }$ ac supply. The rms value of current in the circuit is

In an alternating current circuit consisting of element in series, the current increases on increasing the frequency of supply. Which of the following elements are likely to constitute the circuit?