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1. |
A 38-pole, 3-phase, 80 Hz induction motor is operating at a speed of 12 rpm. The frequency of the rotor current of the motor in Hz is __________ |
A. | 75.2 |
B. | 76.1 |
C. | 79.2 |
D. | 79.6 |
Answer» C. 79.2 | |