The speed of an asynchronous four-pole motor fed at a frequency of 400 Hertz is:
Domanda 539, Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license
| 6000 Revolutions Per Minute. |
| 12000 revolutions per minute. |
| 1600 revolutions per minute. |
| 800 Revolutions Per Minute. |
