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 2024 and IES 2024 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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