by increasing the rotor resistance

by increasing the stator resistance

by increasing the air-gap between the stator and the rotor

none of these

infinite

unit

zero

none of these

high voltage

low power factor

zero back e.m.f.

none of these

slip-ring motor

synchronous motor

squirrel-cage induction-motor

single-phase motor

Faraday's law

Rotating magnetic field

Fleming's right-hand rule

Ohm's law