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The dc series generator is employed as ____________

(a) a booster to maintain constant voltage at the end of the feeder

(b) for supplying traction load

(c) for battery bank charging

(d) none of the mentioned

The question was posed to me in semester exam.

My question is based upon Machine Applications in chapter Electrical Machine Applications/Armature Reaction and Commutation of Electrical Machines

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Correct option is (a) a booster to maintain constant voltage at the end of the feeder

The explanation is: Referring to the external characteristics of dc series generator shows that the terminal end voltage increases as the loading increases from no load to full load. In feeders due to variable requirements the voltage drops while transferring when loading is raised.

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