DC Generator Quiz

The resistance of armature winding depends on

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In lap winding, the number of brushes is always

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The bearings used to support the rotor shafts are generally

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

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Laminations of core are generally made of

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In case of a 4-pole D.C. generator provided with a two layer lap winding with sixteen coils, the pole pitch will be

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In D.C. generators, current to the external circuit from armature is given through

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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

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Copper brushes in D.C. machine are used

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The number of brushes in a commutator depends on

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In D.C. generators, lap winding is used for

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

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The armature of D.C. generator is laminated to

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The material for commutator brushes is generally

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

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In a four-pole D.C. machine

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In D.C. generators, the brushes on commutator remain in contact with conductors which

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Brushes of D.C. machines are made of

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

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The insulating material used between the commutator segments is normally

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

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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. ?

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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

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

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DC Generator Quiz
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