Defence Exam  >  Defence Questions  >  In a dc generator, sparking at brushes result... Start Learning for Free
In a dc generator, sparking at brushes results due to 
  • a)
    winding distribution
  • b)
    armature reactance
  • c)
    high constant resistance of the brushes
  • d)
    reactance voltage in coil undergoing commutation
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
In a dc generator, sparking at brushes results due toa)winding distrib...
In commutation, if reversal of current is completed during the short circuit time then the coil develops reactance voltage due to which sparking occurs at the brushes.
View all questions of this test
Most Upvoted Answer
In a dc generator, sparking at brushes results due toa)winding distrib...

Reason for sparking at brushes in a DC generator:

Sparking at brushes in a DC generator occurs due to various factors, but the main reason is the presence of reactance voltage in the coil undergoing commutation.

Explanation:


  • Reactance voltage in coil undergoing commutation: During commutation in a DC generator, the coil undergoing the process experiences a change in current direction. This change in current results in the generation of reactance voltage in the coil. This reactance voltage causes sparking at the brushes due to the sudden change in current flow.



In addition to the reactance voltage in the coil undergoing commutation, other factors such as winding distribution, armature reactance, and high constant resistance of the brushes can also contribute to sparking at the brushes in a DC generator. However, the reactance voltage plays a significant role in causing sparking during the commutation process.

By understanding the factors leading to sparking at brushes in a DC generator, proper maintenance and adjustments can be made to minimize sparking and ensure the efficient operation of the generator.
Explore Courses for Defence exam
In a dc generator, sparking at brushes results due toa)winding distributionb)armature reactancec)high constant resistance of the brushesd)reactance voltage in coil undergoing commutationCorrect answer is option 'D'. Can you explain this answer?
Question Description
In a dc generator, sparking at brushes results due toa)winding distributionb)armature reactancec)high constant resistance of the brushesd)reactance voltage in coil undergoing commutationCorrect answer is option 'D'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about In a dc generator, sparking at brushes results due toa)winding distributionb)armature reactancec)high constant resistance of the brushesd)reactance voltage in coil undergoing commutationCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a dc generator, sparking at brushes results due toa)winding distributionb)armature reactancec)high constant resistance of the brushesd)reactance voltage in coil undergoing commutationCorrect answer is option 'D'. Can you explain this answer?.
Solutions for In a dc generator, sparking at brushes results due toa)winding distributionb)armature reactancec)high constant resistance of the brushesd)reactance voltage in coil undergoing commutationCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Defence. Download more important topics, notes, lectures and mock test series for Defence Exam by signing up for free.
Here you can find the meaning of In a dc generator, sparking at brushes results due toa)winding distributionb)armature reactancec)high constant resistance of the brushesd)reactance voltage in coil undergoing commutationCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of In a dc generator, sparking at brushes results due toa)winding distributionb)armature reactancec)high constant resistance of the brushesd)reactance voltage in coil undergoing commutationCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for In a dc generator, sparking at brushes results due toa)winding distributionb)armature reactancec)high constant resistance of the brushesd)reactance voltage in coil undergoing commutationCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of In a dc generator, sparking at brushes results due toa)winding distributionb)armature reactancec)high constant resistance of the brushesd)reactance voltage in coil undergoing commutationCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice In a dc generator, sparking at brushes results due toa)winding distributionb)armature reactancec)high constant resistance of the brushesd)reactance voltage in coil undergoing commutationCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Defence tests.
Explore Courses for Defence exam
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev