The synchronous speed of 60 Hz, 4 Pole Induction Motor is | Induction Motor MCQ#5

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The synchronous speed of 60 Hz, 4 Pole Induction Motor is:

  1. 900 RPM
  2. 1800 RPM
  3. 3600 RPM
  4. 7200 RPM

Correct answer: 2. 1800 RPM

Explanation: From Formula of synchoronous speed of induction motors magnetic fields:

ηsync= 120*f /P

Here f = 60 Hz

P = 4 pole

So Speed = 120 * 60 / 4 = 1800 RPM

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