A 3-phase induction motor runs at almost 1100 rpm at no load and 640 r – McqOptions

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1.	A 3-phase induction motor runs at almost 1100 rpm at no load and 640 rpm at full load when supplied with power from a 50 Hz, 3-phase supply. What is the corresponding speed of the rotor field with respect to the rotor?
A.	430 revolution per minute
B.	440 revolution per minute
C.	460 revolution per minute
D.	450 revolution per minute
Answer» D. 450 revolution per minute

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