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Which of the following have different external characteristic than other?

(a) Self excited DC shunt generator

(b) Separately excited generator

(c) Compound DC generator

(d) Series DC generator

I got this question in an interview.

Enquiry is from Characteristics of Separately Excited Generators topic in chapter DC Generator of DC Machines

1 Answer

+1 vote
by (1.2m points)
The correct option is (d) Series DC generator

For explanation I would say: Unlike Self excited DC shunt generator, separately excited generator, compound DC generator the voltage at zero load current for DC series motor doesn’t start from some positive non-zero value, instead it starts from origin.

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