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What should be the length of pole with respect to the length of the armature and what should be the range of the length of pole?

What should be the length of pole with respect to the length of the armature and what should be the range of the length of pole? Correct Answer length of pole < length of armature, 10-15 mm

The length of the pole should be very much less than the length of the armature in order to permit the end play and t avoid magnetic centering. It should be in the range of 10-15 mm.

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