MotorsQuestion 1445 of 1506

A 10-pole induction motor runs on a 60 Hz supply. What is its synchronous speed?

  1. 1200 rpm
  2. 1440 rpm
  3. 720 rpm
  4. 6000 rpm
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Correct answer: 720 rpm

Ns = 120 × f ÷ P = 120 × 60 ÷ 10 = 720 rpm.

Source: Computed, 13.2: Synchronous Motors

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Questions last reviewed: 18 October 2026