Which of the following methods is easily applicable to control the sp – McqOptions

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1.	Which of the following methods is easily applicable to control the speed of the squirrel-cage induction motor?
A.	By changing the number of stator poles
B.	Rotor rheostat control
C.	By operating two motors in cascade
D.	By injecting e.m.f. in the rotor circuit
Answer» B. Rotor rheostat control

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