1.A 3-phase, 60-Hz induction motor has 8 poles and operates with a slip of 0.05 for a certain load. Compute the speed of the rotor field with respect to the stator field.

2.A 3-phase, 6-pole induction motor runs on no-load at 1160 rpm. Determine the slip and frequency of rotor currents on no-load.

3.An induction motor runs at 3510 rpm. Calculate the percent slip.

4.A 4-pole induction motor, running with 5% slip, is supplied by a 6 pole synchronous generator driven at 1200 rpm. What is the motor speed?

5.An induction motor are often braked rapidly by a technique known as "plugging", which is the reversal of the phase sequence of the voltage supplying the motor. With 4 poles is operating at 1750 rpm from an available infinite bus at 60 Hz. Two of the supply leads are suddenly interchanged. What is the new slip and rotor current frequency?