In an $A.C.$ circuit, $I_{\text {rms }}$ and $I_{0}$ are related as
$I _{ rms }=\frac{1}{\pi} I _{0}$
$I _{ rms }=\frac{1}{\sqrt{2}} I _{0}$
$I _{ rms }=\sqrt{2} I _{0}$
$I _{ rms }=\pi I _{0}$
A $280$ ohm electric bulb is connected to $200V$ electric line. The peak value of current in the bulb will be
The ratio of peak value and r.m.s value of an alternating current is
An $ac$ source is rated at $220V, 50 Hz.$ The time taken for voltage to change from its peak value to zero is.....$sec$
For the $RC$ circuit shown, the resistance is $R = 10.0\ W$, the capacitance is $C = 5.0\ F$ and the battery has voltage $\xi= 12$ volts . The capacitor is initially uncharged when the switch $S$ is closed at time $t = 0$. At some time later, the current in the circuit is $0.50\ A$. What is the magnitude of the charge across the capacitor at that moment?.......$µC$
An alternating current is given by the equation $i=i_{1} \sin \omega t+i_{2} \cos \omega t$. The rms current will be