Polyphase Induction Motors

5 H.P., 50Hz, 3-phase, 440 V, induction motors are available for the following r.p.m. Which motor will be the costliest?

  • A. 730 r.p.m.
  • B. 960 r.p.m.
  • C. 1440 r.p.m.
  • D. 2880 r.p.m.
Answer: Option A.

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