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D.C. Generators MCQ Questions & Answers | Electrical Engineering

Learn D.C. Generators MCQ questions & answers are available for a Electrical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. D.C. Generators MCQ question is the important chapter for a Electrical Engineering and GATE students. Page-4 section-1

Each section contains 100 MCQs on D.C. Generators .
31
A series generator can self-excite
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Answer & Solution
Answer: Option B
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32
The armature of D.C. generator is laminated to
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Answer: Option D
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33
The material for commutator brushes is generally
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Answer: Option D
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34
Armature coil is short circuited by brushes when it lies
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Answer: Option A
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35
Satisfactory commutation of D.C. machines requires
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Answer: Option D
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36
A D.C. generator can be considered as
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Answer & Solution
Answer: Option C
Solution:
A D.C. generator can be considered as a rotating amplifier because it converts mechanical energy into electrical energy by electromagnetic induction.

The generated voltage is proportional to the speed of rotation and the magnetic flux, thereby amplifying the mechanical input into an electrical output.

This amplification property is why it is often compared to an amplifier in the electrical domain.

Other options, such as rectifier, prime mover, and power pump, do not match the fundamental operation of a D.C. generator.

Rectifier: Converts AC to DC, not applicable here.

Prime mover: Provides mechanical energy to drive the generator but is not the generator itself.

Power pump: Refers to fluid systems and is unrelated to D.C. generators.

Thus, the correct analogy for a D.C. generator is a rotating amplifier.
37
In case of a flat compounded generator
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Answer: Option C
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38
The e.m.f. generated in a D.C. generator is directly proportional to
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Answer: Option D
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39
A 220 V D.C. generator is run at full speed without any excitation. The open circuit voltage will be
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Answer: Option B
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40
If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by
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Answer: Option A
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