Determine the kW rating of a 11.42-hp motor. Suppose the wattage consumed by the motor is 3.75 kW and it produces an output of 4.75 hp. What is the efficiency of the motor? Describe the principles of the alternating and rotating magnetic fields. List the different types of rotors and stators in AC motors. List the factors that determine the speed of an AC motor. Calculate the following for an AC motor:

Synchronous Speed                       Slip