What is an alternating emf?

State the average or mean value of an alternating emf? Obtain the expression for it

What is meant by alternating emf?

If the peak value of an alternating emf is 15V, what is its mean value over half cycle?

The equation of an alternating emf is epsi =50 sin 100 pi t Calculate (i) the perk volue of the emf of the emf (ii) the mean volue of the emf (iii) rms volue of the emf (iv) What Is the interval at which at which it attains maximum value?

How is the phasor of alternating emf or current represented ?

A capacitance of 0.4 muF is connected to an alternating e.m.f. of frequency 100 Hz. What is the capacitive reactance ?