If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be____________?

Related Mcqs:

1. Two generators A and B have 6-poles each. Generator A has wave wound armature while generator B has lap wound armature. The ratio of the induced e.m.f. is generator A and B will be_______________?

   A. 2 : 3 B. 3 : 1 C. 3 : 2 D. 1 : 3...

2. Following D.C. generator will be in a position to build up without any residual magnetism in the poles______________?

   A. series generator B. shunt generator C. compound generator D. self-excited generator...

3. Which of the following D.C. generators will be in a position to build up without any residual magnetism in the poles?

   A. Series generator B. Shunt generator C. Compound generator D. None of the above...

4. The e.m.f. generated by a shunt wound D.C. generator isE. Now while pole flux remains constant, if the speed of the generator is doubled, the e.m.f. generated will be_______________?

   A. E/2 B. 2E C. slightly less than E D. E...

5. A cumulatively compounded long shunt generator when operating as a motor would be____________?

   A. cumulatively compounded long shunt B. deferentially compounded long shunt C. cumulatively compounded short shunt D. differentially compounded short shunt...

6. The terminal voltage of a series generator is 150 V when the load current is 5 A. If the load current is increased to 10 A, the terminal voltage will be____________?

   A. 150 V B. less than 150 V C. greater than 150 V D. none of the above...

7. Which of the following components of a D.C, generator plays vital role for providing direct current of a D.C. generator ?

   A. Dummy coils B. Commutator C. Eye bolt D. Equilizer rings...

8. The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be_____________?

   A. 640 V B. 620 V C. 600 V D. 580 V...

9. In a D.C. generator in order to reduce sparking at brushes, the self-induced e.m.f. in the coil is neutralised by all of the following except______________?

   A. interpoles B. dummy coils C. compensating winding D. shifting of axis of brushes...

10. According to Fleming’s right-hand rule for finding the direction of induced e.m.f., when middle finger points in the direction of induced e.m.f., forefinger will point in the direction of____________?

    A. motion of conductor B. lines of force C. either of the above D. none of the above...