In a D.C. generator in case the resistance of the field winding is increased, then output voltage will____________?

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. A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave will_____________?

   A. will be zero B. will be of 5 Hz C. will be of 5 xiVHz D. will be of v Hz 5...

3. 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...

4. Two D.C. shunt generators, each with armature resistance of 0.02 ohm and field resistance of 50 ohm run in parallel and supply a total current of 1000 amperes to the load circuit. If their e.m.fs. are 270 V and 265 V, their bus bar voltage will be_____________________?

   A. 270 V B. 267.5 V C. 265 V D. 257.4 V...

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

   A. 4 B. 8 C. 16 D. 32...

6. 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...

7. In a D.C. generator the critical resistance refers to the resistance of_____________?

   A. brushes B. field C. armature D. load...

8. The critical resistance of the D.C. generator is the resistance of_____________?

   A. field B. brushes C. armature D. load...

9. In a D.C. generator the critical resistance can be increased by_____________?

   A. increasing its field resistance B. decreasing its field resistance C. increasing its speed D. decreasing its speed...

10. 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___________ ?

    A. Lap winding B. Wave winding C. Either of A. and B. above D. Depends on other features of design...