Two alternating current are given by
`l_(1)=l_(0)" sin "omega t `and l `l_(2)=l_(0) cos (omega +phi)
The ratio of rms value is

Two alternating currents are given by I_1=I_0 sin (omegat-phi) and I_2=I_1 cos (omega t+phi) . What is the ratio of virtual values of the two currents?

The AC's are given by l_(1)=l_(0)sinomegat,l_(2)=l_(0)cos(omegat+phi) the ratio of rms values is

An altemating current is given by 1 = 1_(1) cos omega t + 1_(2) sin omega t. The RMS value of current is given by

If an alternating current is given by i = a sin ( omega t) + b cos ( omega t), then RMS value of current is :-

The instantaneous values of emf and the current in a series ac circuit are - E = Eo Sin omega t and l = lo sin (omega t + pi //3) respectively, then it is