MotorsQuestion 1458 of 1506

A motor has a synchronous speed of 1800 rpm and runs at 1710 rpm at full load. What is the slip?

  1. 50.0 %
  2. 5.26 %
  3. 95.0 %
  4. 5.00 %
Show answer

Correct answer: 5.00 %

Slip = (Ns − N) ÷ Ns × 100 = (1800 − 1710) ÷ 1800 × 100 = 5.00 %.

Source: Computed, 13.7: Tesla Polyphase Induction Motors

Practice motors

Questions last reviewed: 18 October 2026