Speed of 2 Pole Motor

Ns=(120 x Frequency)/Number of Poles

Ns=(120×50)/2=3000 RPM

Speed of 4 Pole Motor

Ns=(120 x Frequency)/Number of Poles

Ns=(120×50)/4=1500 RPM

Speed of 8 Pole Motor

Ns=(120 x Frequency)/Number of Poles

Ns=(120×50)/8=750 RPM

#
**1) **The synchronous speed of a 2, 4 and 8 poles motor at 50 Hz can not be

**Answer is:**

## 1000 R.P.M.

**Explanation:**

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