Which of the following methods is easily applicable to control the speed of the squirrel-cage induction motor ________?
ABy changing the number of stator poles
BRotor rheostat control
CBy injecting e.m.f. in the rotor circuit
DBy operating two motors in cascade
Correct answer
A. By changing the number of stator poles
Explanation
The correct answer is By changing the number of stator poles.