The demagnetising component of armature reaction in a D.C. generator___________?
Correct answer: A. reduces generator e.m.f.
- A. reduces generator e.m.f.
- B. increases armature speed
- C. reduces interpoles flux density
- D. results in sparking trouble
Explanation
The demagnetizing component of armature reaction weakens the main field flux, so the generated emf decreases according to E ∝ ΦN. Sparking is more directly associated with poor commutation, although weakened flux can aggravate machine performance.
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