Q. What is Self-excitation in DC shunt generator?

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Q. For self-excited DC generator, field circuit curve in the OCC will be __________

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Q. Intersection of Rf line and magnetization curve will give _____________

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Q. What will happen if field resistance is decreased?

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Q. No-load voltage can’t be defined where _____________

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Q. Machine does not excite to an appreciable value when ___________

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Q. No-load voltage observed at two different field resistance values, is V1 < V2. What will be the relation in field resistance values?

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Q. No-load voltage observed at two different field resistance values, is V1 < V2. What will be the relation in speed if field resistance is kept same for both cases?

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Q. DC generator will not self-excite in __________

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Q. Which of the following is not a reason, behind failing of self-exciting machine?

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Q. By changing the polarity of the armature of failed self-exciting machine, machine can be started.

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Q. Which of the following will be useful to generate positive feedback?

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Q. Characteristics of separately excited DC generator are drawn by keeping _____

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Q. What is the reason behind dropping down of Eₐ with load?

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Q. External characteristic differ from an internal characteristic in separately excited DC generator by _________

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Q. The variation in terminal voltage of DC shunt generator with respect to variation in separately excited DC generator is ___________

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Q. Which of the following characteristic lies above of all others?

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Q. Why differential compound generator is not used in practice?

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Q. How compounding level in a compound machine is adjusted?

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Q. Which of the following have different external characteristic than other?

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