Japan has both a 50 Hz power system and a 60 Hz power system. A motor - generator set is designed to connect the two. The basis is that the motor would be operated from the 50 Hz system and on a common shaft, a 60 Hz generator would be driven. Thus power could be transferred from the 50 Hz to the 60 Hz systems. Let Pm be the number of poles on the 50 Hz motor, and let Pg be the number of poles of the 60 Hz generator. Find the smallest number for Pm and Pg. Keep in mind that Pm and Pg must be even integers.