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

Related Mcqs:

1. 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

2. 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

3. 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

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. The series field of a short-shunt D.C. generator is excited by_______________?

   A. external current
   B. armature current
   C. shunt current
   D. load current

6. The terminal voltage of a D.C. shunt generator drops on load because of all of the following reasons except:_____________?

   A. armature reaction
   B. armature resistance drop
   C. field weakening due to armature reaction and armature
   D. commutation

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

   A. increase
   B. decrease
   C. remain unaffected
   D. fluctuate heavily

8. 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

9. 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

10. A shunt generator running at 1000 r.p.m. has generated e.m.f. as 200 V. If the speed increases to 1200 r.p.m., the generated e.m.f. will be nearly_______________?

    A. 150 V
    B. 175 V
    C. 240 V
    D. 290 V