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- Subject
- D.C. Generatorselectrical-engineering-mcqs › d-c-generators
- Published
- 5 Jul 2018
- Last updated
- 28 May 2026
Explanation
A shunt generator is capable of self-excitation only if the resistance in its field circuit is less than a specific critical value. If the resistance is too high, the generator cannot build up voltage, preventing self-excitation.
More D.C. Generators MCQs
Practice related questions from the same subject.
- 1.What fundamental principle does a direct current (D.C.) generator operate on?
- 2.Under what condition can a series generator initiate self-excitation?
- 3.If the open circuit voltage of a compound generator is 250 V, what can be said about its terminal voltage when operating at full load?
- 4.A series generator has a terminal voltage of 150 V at a load current of 5 A. What will the terminal voltage be if the load current rises to 10 A?
- 5.For a DC generator, which value of voltage regulation is considered ideal?
- 6.Two DC shunt generators, each having an armature resistance of 0.02 ohms and a field resistance of 50 ohms, operate in parallel to deliver a combined load current of 1000 A. If their electromotive forces (e.m.f.) are 270 V and 265 V respectively, what will be the voltage at the bus bars?
- 7.What is the key requirement for two DC generators to operate in parallel successfully?
- 8.Why is an equalizer bar employed when two DC generators operate in parallel?
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