Alternating current can not be measured by dc ammeter because
$ac$ cannot pass through dc ammeter
Average value of complete cycle is zero
$D.C.$ ammeter will get damaged.
$ac$ changes its direction
The effective value of current $i = 2\, sin\, 100\, \pi\, t + 2 \,sin(100\, \pi \,t + 30^o)$ is :
In an $ac$ circuit $I = 100\, sin \,200$ $\pi t.$ The time required for the current to achieve its peak value will be
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.
What is the sum of the instantaneous current values over one complete $AC$ cycle ?
The ratio of peak value and r.m.s value of an alternating current is