The ratio of the peak value to the root mean square (r.m.s.) value of an alternating current is:

The peak value of an alternating e.m.f. $E$ given by $E = E_0 \cos \omega t$ is $10 \ V$ and its frequency is $50 \ Hz$. At time $t = \frac{1}{600} \ s$,the instantaneous e.m.f. is:

$A$ standard filament lamp consumes $100\,W$ when connected to $200\,V$ $AC$ mains supply. The peak current through the bulb will be $........\,A$.

The frequency of $AC$ mains in India is ....... $Hz$.

What is the average value of the $AC$ voltage over a complete cycle?

What is $AC$ voltage? Write the equation for $AC$ voltage.