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What would the pole pass frequency be for an AC Induction motor running at 878 RPM? ( Assume a VFD is not being used.) A)

What would the pole pass frequency be for an AC Induction motor running at 878
RPM? (Assume a VFD is not being used.)
A) 176 Hz
B) 2.93 Hz
C) 22 Hz
D) 0.37 Hz

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