A coil is rotated between a pair of poles. Calculate the frequency of the generated emf if the rotational speed is
(a) 150 rev/s,
(b) 900 rev/minute,
(c) 200 rad/s.
2. An alternator has 8 poles. If the motor winding is rotated at 1500 rev/minute, determine
(a) the frequency of the generated emf, and
(b) the speed of rotation required to produce frequency of 50 Hz.