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QUESTION
A 5 kW three-phase induction motor operates at 1425 RPM. It has an efficiency of 83.6% and a power factor of 0. It connects to a 415V 50Hz supply.
A 5 kW three-phase induction motor operates at 1425 RPM. It has an efficiency of 83.6% and a power factor of 0.82. It connects to a 415V 50Hz supply.
（1）State the likely number of poles in this motor
（2）Calculate the slip (%)
