RPSC Quiz

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

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. ?

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

Copper brushes in D.C. machine are used

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

The bearings used to support the rotor shafts are generally

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

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

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

The armature of D.C. generator is laminated to

Lamination’s of core are generally made of

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

In D.C. generators the polarity of the interpoles

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

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

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

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

The resistance of armature winding depends on

In a commutator

In a four-pole D.C. machine

Permeance is the reciprocal of

In lap winding the number of brushes is always

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

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