The plugging gives the____________?

Related Mcqs:

The speed of a D.C. shunt motor more than its full-load speed can be obtained by_____________?

A. decreasing the field current B. increasing the field current C. decreasing the armature current D. increasing the armature current...

In D.C. machines fractional pitch winding is used__________?

A. to improve cooling B. to reduce copper losses C. to increase the generated e.m.f. D. to reduce the sparking...

The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is______________?

A. 4.0 B. 2.0 C. 1.0 D. 0.5...

The main disadvantage of the Ward-Leonard control method is______________?

A. high initial cost B. high maintenance cost C. low efficiency at Hght loads D. all of the above...

In which of the following device the generated emf and armature current are in the opposite directions?

A. dc generator B. dc motor C. transformer D. all of the above...