Example 10.6 Application: The AC Generator An AC generator is made as shown in Figure 10.11. The coil
contains N ¼ 500 turns and is supplied with a sinusoidal current of amplitude I ¼ 10 A and frequency 60 Hz. The
relative permeability of iron is μr ¼ 1,000. The loop is 10 mm 10 mm and rotates at 3,600 rpm. Assume the flux
density in the gap is uniform and perpendicular to the iron surfaces and the B(H) curve is linear:
(a) Calculate the emf of the loop.
(b) What is the waveform of the emf?
(c) Suppose you need to generate a 10 V output (peak) using this device. How many turns are required in the rotating
coil?