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1. |
A 500 HP, 440 V, 3-phase, 50 Hz induction motor runs at 950 r.p.m. when on full load with a synchronous speed of 1000 r.p.m. For this condition, the frequency of the rotor current will be |
A. | 4.0 Hz |
B. | 3.5 Hz |
C. | 2.5 Hz |
D. | 2.0 Hz |
Answer» D. 2.0 Hz | |