The critical resistance of the D.C. generator is the resistance of_____________?
Correct answer: A. field
- A. field
- B. brushes
- C. armature
- D. load
Explanation
Critical resistance is the maximum resistance of the field circuit at which a self-excited generator can build up voltage. If the field resistance exceeds this value, voltage build-up fails.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Electrical Machines
1,061 free Electrical Machines MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electrical Machines questions
As a result of armature reaction, the reduction in the total mutual air gap flux in a D.C. generator is approximately______________?
Shunt generators are most suited for stable parallel operation because of their______________?
When two D.C. series generators are running in parallel, an equilizer bar is used________________?
The series field of a short-shunt D.C. generator is excited by_______________?
In a separately excited generator supplying rated load the armature reaction.
For both lap and wave windings, there are as many commutator bars as the number of_____________?