The effective value of current $i = 2\, sin\, 100\, \pi\, t + 2 \,sin(100\, \pi \,t + 30^o)$ is :
$\sqrt 2 A$
$2\,\sqrt {2 + \sqrt 3 } $
$4$
None
The frequency of an alternating voltage is $50$ cycles/sec and its amplitude is $120\,V$. Then the $ r.m.s$. value of voltage is........$V$
A alternating current at any instant is given by $i=\left[6+\sqrt{56} \sin \left(100 \pi t+\frac{\pi}{3}\right)\right] A$. The rms value of the current is_________.A.
Find the rms value for the saw-tooth voltage of peak value $V_0$ from $t = 0$ to $t = 2T$ as shown in figure
In a circuit, the value of the alternating current is measured by hot wire ammeter as $10$ ampere. Its peak value will be......$A$
An $AC$ current is given by $I = I_0 + I_1$ $sin\, wt$ then its $rms$ value will be