An $AC$ supply gives $30 \ V$ $rms$ which passes through a $10 \ \Omega$ resistance. The power dissipated in it is ...... $W$.

In an a.c. circuit with pure capacitance $C$ and a.c. source $E=E_0 \sin \omega t$,the equation of instantaneous current is given by

In which circuit is the average power consumed maximum?

$A$ capacitor of $50 \mu F$ is connected to a power source $V = 220 \sin 50 t$ (where $V$ is in volt and $t$ is in second). Find the value of the $rms$ current (in ampere).

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

An $AC$ voltage of $10 \sin \omega t$ volt is applied to a pure inductor of inductance $10 \ H$. The current through the inductor in ampere is