Slip rings are usually made of__________?

Related Mcqs:

The speed regulation of a synchronous motor is always___________?

A. 1% B. 0.5% C. positive D. zero...

The magnitude of field flux in a 3-phase synchronous motor?

A. varies with power factor B. varies with speed C. varies with the load D. remains constant at all loads...

While starting a synchronous motor by induction motor action, field winding is usually_____________?

A. connected to D.C. supply B. short-circuited by low resistance C. kept open-circuited D. none of the above...

A synchronous motor can be used as a synchronous capacitor when it is____________?

A. under-loaded B. over-loaded C. under-excited D. over-excited...

When the voltage applied to a synchronous motor is increased, which of the following will reduce?

A. Stator flux B. Pull in torque C. Both A. and (b) D. None of the above...