Armature coil is short circuited by brushes when it lies_____________?

Related Mcqs:

According to Fleming’s right-hand rule for finding the direction of induced e.m.f., when middle finger points in the direction of induced e.m.f., forefinger will point in the direction of____________?

A. motion of conductor B. lines of force C. either of the above D. none of the above...

If a D.C. generator fails to build up the probable cause could not be_____________?

A. imperfect brush contact B. field resistance less than the critical resistance C. no residual magnetism in the generator D. faulty shunt connections tending to reduce the residual magnetism...

A cumulatively compounded long shunt generator when operating as a motor would be____________?

A. cumulatively compounded long shunt B. deferentially compounded long shunt C. cumulatively compounded short shunt D. differentially compounded short shunt...

In a D.C. generator the number of mechanical degrees and electrical degrees will be the same when____________?

A. r.p.m. is more than 300 B. r.p.m. is less than 300 C. number of poles is 4 D. number of poles is 2...

The terminal voltage of a series generator is 150 V when the load current is 5 A. If the load current is increased to 10 A, the terminal voltage will be____________?

A. 150 V B. less than 150 V C. greater than 150 V D. none of the above...