A 6-pole, 50 Hz wound rotor induction motor when supplied at the rated voltage and frequency with slip-ring open-circuited, developed a voltage of 100 V between any two rings. If rotor is driven by an external means at 1000 rpm opposite to then direction of startor field, the frequency of voltage across an slip-rings will be

A 6-pole, 50 Hz wound rotor induction motor when supplied at the rated

1.	A 6-pole, 50 Hz wound rotor induction motor when supplied at the rated voltage and frequency with slip-ring open-circuited, developed a voltage of 100 V between any two rings. If rotor is driven by an external means at 1000 rpm opposite to then direction of startor field, the frequency of voltage across an slip-rings will be
A.	zero
B.	50 Hz
C.	100 Hz
D.	200 Hz
Answer» B. 50 Hz

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