$AC$ measuring instruments measure

In an $ac$ circuit,the instantaneous voltage $e(t)$ and current $i(t)$ are given by $e(t) = 5[\cos \omega t + \sqrt{3} \sin \omega t] \ V$ and $i(t) = 5[\sin(\omega t + \frac{\pi}{4})] \ A$. Determine the phase relationship between voltage and current.

The $AC$ voltage across a resistance can be measured using a

Find the time required for $50\,Hz$ alternating current to change its value from zero to maximum value.

An alternating current of $rms$ value $10 \, A$ is passed through a $12 \, \Omega$ resistor. The maximum potential difference across the resistor is

In alternating current circuits,the $a.c.$ meters measure