Electrical Engineering Questions And Answers :: Dc Generators: part1

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Electrical Engineering : Dc Generators QUESTIONS AND ANSWERS :: part1 : 16 to 20

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2014 and IES 2014 examinations :

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

commutator
solid connection
slip rings
none of above

17.In a commutator

copper is harder than mica
mica and copper are equally hard
mica is harder than copper
none of the above

18.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

Blv
Blv2
Bl2v
Bl2v2

19.The material for commutator brushes is generally

mica
copper
cast iron
carbon

20.Copper brushes in D.C. machine are used

where low voltage and high currents are involved
where high voltage and small cur-rents are involved
in both of the above cases
in none of the above cases

More Dc Generators QUESTIONS AND ANSWERS available in next pages

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