The laminations of the armature of a D.C. machine are usually ___________ thick?
Correct answer: D. 0.4 to 0.5 mm
- A. 0.1 to 0.2 mm
- B. 0.2 to 0.3 mm
- C. 0.3 to 0.4 mm
- D. 0.4 to 0.5 mm
Explanation
Armature laminations in ordinary DC machines are commonly about 0.4 to 0.5 mm thick. Laminations reduce eddy-current loss while remaining mechanically strong enough for the rotating armature.
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