AC Generator: a Rectangular Coil Having N Turns and Measuring

Multiple Choice

AC generator: A rectangular coil having N turns and measuring 15 cm by 25 cm is rotating in a uniform 1.6-T magnetic field with a frequency of 75 Hz. The rotation axis is perpendicular to the direction of the field. If the coil develops a sinusoidal emf of maximum value 56.9 V, what is the value of N?

A) 2
B) 4
C) 6
D) 8
E) 10