11. Equalizer rings are required in case armature is
12. 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
13. Following energized winding of a D.C. machine should not be opened as it would produce high inductive voltage which may be dangerous to personnel and may cause its own insulation failure.
14. The essential condition for parallel operation of two D.C. generators is that they have
15. A D.C. generator works on the principle of
16. In a D.C. generator in case the resistance of the field winding is increased, then output voltage will
17. In case of D.C. machines, mechanical losses are primary function of
18. Which of the following generator will have negligible terminal voltage while running on no-load?
19. To achieve sparkless commutation brushes of a D.C. generator are rockedm ahead so as to bring them
20. In over compounded generator, full load terminal voltage is
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