7) The principle of operation of an induction-motor is based on :

Faraday's law

Rotating magnetic field

Fleming's right-hand rule

Ohm's law

Answer is:

Rotating magnetic field

the same as the synchronous speed

higher than the synchronous speed

lesser than the synchronous speed

determined by the frequency and the number of poles

Answer is:

interchange all the three line connections

reverse the polarity of the rotor's circuit

increase the resistance of the rotor's circuit

interchange any two out of the three line connections

Answer is:

slip-rings

rotor windings

stator windings

rotating part

Answer is:

zero starting torque

very small starting torque

very high starting torque

highest starting torque amongst all types of induction motors

Answer is: