When an $a.c.$ source is connected across a pure capacitor, the correct phase relation between current and $emf$ is:

The resistance offered by the inductor $(X_L)$ in an ac circuit is

The rms value of conduction current in a parallel plate capacitor is $6.9\,\mu A$. The capacity of this capacitor,if it is connected to a $230\,V$ $AC$ supply with an angular frequency of $600\,rad/s$,will be $....\,pF$.

$A$ 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:

An inductance of $1 \ H$ is connected in series with an $AC$ source of $220 \ V$ and $50 \ Hz$. The inductive reactance (in ohm) is: (in $\pi$)

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