The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as___________?

A synchronous motor can develop synchronous torque:

A. when under loaded

B. while over-excited

C. only at synchronous speed

D. below or above synchronous speed

The maximum power developed in a synchronous motor will depend on__________?

A. the rotor excitation only

B. the supply voltage only

C. the rotor excitation and supply volt-age both

D. the rotor excitation, supply voltage and maximum value of coupling angle (90°)

E. none of the above

In a synchronous motor, the breakdown torque is__________?

A. directly proportional to the square of the applied voltage

B. directly proportional to applied voltage

C. inversely proportional to applied voltage

D. none of the above

A synchronous motor which works on a leading power factor and does not drive a mechanical load is called as_________?

A. static condenser

B. condenser

C. synchronous condenser

D. none of the above

If the synchronous motor, properly synchronised to the supply is running on no load and is having negligible loss then_____________?

A. the stator current will be zero

B. the stator current will be very small

C. the stator current will be very high

D. the back e.m.f. will be more than the supply voltage

E. none of the above