1. List the type of losses in electric machine. What is the nature of each loss?
2. What is the relative speed between stator and rotor rotating fields in an induction motor?
3. Sketch the torque-slip characteristic of an induction motor. Explain the nature of the low slip part of the characteristic. Locate on the characteristic the full-load torque operating point.
4. Explain how an induction motor can self-start but cannot run at synchronous speed.
5. Explain why rotor induced emf is proportional to slip.