AC motors

#1. Synchronous motors are usually supplied by:

• Athree phase AC
• Bsingle phase AC
• CDC to the stator
• DDC to the stator and AC to the rotor.

#2. Reversing two phases to a three phase motor will:

• Ablow the phase fuses.
• Bcause the motor to run in reverse.
• Coverheat the stator windings
• Dstall the motor.

#3. A synchronous motor runs at a speed that depends upon the supply:

• Avoltage
• Bcurrent
• Creactance
• Dfrequency