Calculate the frequency of the rotor current when the synchronous spee – McqOptions

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1.	Calculate the frequency of the rotor current when the synchronous speed is 1,500 rpm and rotor speed is 1,440 rpm and supply frequency is 50 Hz.
A.	2 Hz
B.	5 Hz
C.	1 Hz
D.	0.5 Hz
Answer» B. 5 Hz

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