What is the synchronous speed of a four-pole motor connected to 50Hz?

The synchronous speed of a motor can be calculated using the formula: ( \text{Synchronous Speed} (N_s) = \frac{120 \times f}{P} ), where ( f ) is the frequency in hertz and ( P ) is the number of poles. For a four-pole motor connected to a 50Hz supply, the synchronous speed is ( N_s = \frac{120 \times 50}{4} = 1500 ) RPM. Thus, the synchronous speed of the motor is 1500 revolutions per minute.