The resistance of armature winding depends on
Correct! Wrong!
In lap winding, the number of brushes is always
Correct! Wrong!
The bearings used to support the rotor shafts are generally
Correct! Wrong!
In D.C. generators, the cause of rapid brush wear may be
Correct! Wrong!
Laminations of core are generally made of
Correct! Wrong!
In case of a 4-pole D.C. generator provided with a two layer lap winding with sixteen coils, the pole pitch will be
Correct! Wrong!
In D.C. generators, current to the external circuit from armature is given through
Correct! Wrong!
If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by
Correct! Wrong!
Copper brushes in D.C. machine are used
Correct! Wrong!
The number of brushes in a commutator depends on
Correct! Wrong!
In D.C. generators, lap winding is used for
Correct! Wrong!
In case of D.C. machines, mechanical losses are primary function of
Correct! Wrong!
The armature of D.C. generator is laminated to
Correct! Wrong!
The material for commutator brushes is generally
Correct! Wrong!
Which of the following could be lamina-proximately the thickness of laminations of a D.C. machine ?
Correct! Wrong!
In a four-pole D.C. machine
Correct! Wrong!
In D.C. generators, the brushes on commutator remain in contact with conductors which
Correct! Wrong!
Brushes of D.C. machines are made of
Correct! Wrong!
While applying Fleming's right-hand rule to And the direction of induced e.m.f., the thumb points towards
Correct! Wrong!
The insulating material used between the commutator segments is normally
Correct! Wrong!
The field coils of D.C. generator are usually made of
Correct! Wrong!
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. ?
Correct! Wrong!
Iron losses in a D.C. machine are independent of variations in
Correct! Wrong!
A separately excited generator as compared to a self-excited generator
Correct! Wrong!
Fleming's right-hand rule regarding direction of induced e.m.f., correlates
Correct! Wrong!
DC Generator Quiz
Your Marks
Share your Results: