$A$ capacitor of capacity $C$ has reactance $X$. If capacitance and frequency become double then reactance will be

The voltage across a pure inductor is represented by the following diagram. Which of the following diagrams will represent the current?

When an a.c. source is connected across a pure resistor,the correct phase relation between current $(i_R)$ and voltage $(e_R)$ is shown in which figure?

$A$ parallel plate capacitor having plates of radius $6 \text{ cm}$ has capacitance $100 \text{ pF}$. It is connected to a $230 \text{ V}$ a.c. supply with angular frequency $300 \text{ rad/s}$. The r.m.s. value of current is:

$A$ $120 \, V$ $AC$ source is connected across a pure inductor of inductance $0.70 \, H$. If the frequency of the source is $60 \, Hz$,the current passing through the inductor is: (in $, A$)

$A$ $15.0 \mu\text{F}$ capacitor is connected to a $220 \text{ V}$,$50 \text{ Hz}$ source. The capacitive reactance of the circuit is . . . . . . $\Omega$.