RPSC Quiz

In a four-pole D.C. machine

In D.C. generators the pole shoes are fastened to the pole core by

In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis when

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

For a D.C. generator when the number of poles and the number of armature conductors is fixed then which winding will give the higher e.m.f. ?

In D.C. generators the polarity of the interpoles

While applying Fleming’s right-hand rule to And the direction of induced e.m.f. the thumb points towards

In a commutator

Copper brushes in D.C. machine are used

In case of D.C. machines mechanical losses are primary function of

The field coils of D.C. generator are usually made of

The armature of D.C. generator is laminated to

The resistance of armature winding depends on

The bearings used to support the rotor shafts are generally

In D.C. generators the cause of rapid brush wear may be

Lamination’s of core are generally made of

Iron losses in a D.C. machine are independent of variations in

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

The commutator segments are connected to the armature conductors by means of

Which of the following could be lamina-proximately the thickness of lamination’s of a D.C. machine ?

Fleming’s right-hand rule regarding direction of induced e.m.f. correlates

The e.m.f. generated in a D.C. generator is directly proportional to

Permeance is the reciprocal of

A separately excited generator as compared to a self-excited generator

In lap winding the number of brushes is always