Sparking at the commutator of a D.C. motor may result in____________?
Correct answer: D. all of the above
- A. damage to commutator segments
- B. damage to commutator insulation
- C. increased power consumption
- D. all of the above
Explanation
Commutator sparking produces intense local heating, which can damage both the copper segments and their insulation, while also increasing losses and power consumption. Hence all listed effects can occur.
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