Electrical Engineering : Dc Generators QUESTIONS AND ANSWERS :: part3 : 6 to 10
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.Interpole flux should be sufficient to |
| neutralise the commutating self induced e.m.f. |
| neutralise the armature reaction flux |
| neutralise both the armature reaction flux as well as commutating e.m.f. induced in the coil |
| perform none of the above functions |
7.In D.C. generators on no-load, the air gap flux distribution in space is |
| sinusoidal |
| triangular |
| pulsating |
| flat topped |
8.The e.m.f. generated in a D.C. generator is directly proportional to |
| flux/pole |
| speed of armature |
| number of poles |
| all of the above |
9.Flashing the field of D.C. generator means |
| neutralising residual magnetism |
| creating residual magnetism by a D.C. source |
| making the magnetic losses of forces parallel |
| increasing flux density by adding extra turns of windings on poles |
10.Open circuited armature coil of a D.C. machine is |
| identified by the scarring of the commutator segment to which open circuited coil is connected |
| indicated by a spark completely around the commutator |
| both (a) and (b) |
| none of the above |
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