MotorsQuestion 1251 of 1506

An induction motor on a 60 Hz supply runs at 3% slip. What is the frequency of the current in the rotor?

  1. 1.8 Hz
  2. 60 Hz
  3. 3 Hz
  4. 58.2 Hz
Show answer

Correct answer: 1.8 Hz

Rotor frequency = slip x line frequency = 0.03 x 60 = 1.8 Hz.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 13.7: Tesla Polyphase Induction Motors

Practice motors

Questions last reviewed: 18 October 2026