Sparking, is discouraged in a D.C. motor because_____________?

Related Mcqs:

These days D.C. motors are widely used in____________?

A. pumping sets B. air compressors C. electric traction D. machine shops...

Flywheel is used with D.C. compound motor to reduce the peak demand by the motor, compound motor will have to be_____________?

A. level compounded B. under compounded C. cumulatively compounded D. differentially compounded...

The losses occurring in a D.C. generator are given below. Which loss is likely to have highest proportion at rated load of the generator ?

A. hysteresis loss B. field copper loss C. armature copper loss D. eddy current loss...

In a D.C. generator, the iron losses mainly take place in___________/

A. yoke B. commutator C. armature conductors D. armature rotor...

If the field winding resistance of a DC shunt motor is increases, its speed will____________?

If the field winding resistance of a DC shunt motor is increases, its speed will A. decreases B. increases C. remains same D. none of the above...