The direction of rotation of a D.C. series motor can be changed by___________?

Related Mcqs:

When two D.C. series motors are connected in parallel, the resultant speed is____________?

A. more than the normal speed B. loss than the normal speed C. normal speed D. zero...

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 speed of a motor falls from 1100 r.p.m. at no-load to 1050 r.p.m. at rated load. The speed regulation of the motor is______________?

A. 2.36% B. 4.76% C. 6.77% D. 8.84%...

The total losses in a well designed D.C. generator of 10 kW will be nearly______________?

A. 100 W B. 500 W C. 1000 W D. 1500 W...

In the D.C. motor the iron losses occur in____________?

A. the field B. the armature C. the brushes D. the commutator...