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What is the relation between number of poles and flux reversal in the armature?

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What is the relation between number of poles and flux reversal in the armature?

(a) number of poles is directly proportional to the flux reversal in the armature

(b) number of poles is indirectly proportional to the flux reversal in the armature

(c) number of poles is directly proportional to the square of the flux reversal in the armature

(d) number of poles is indirectly proportional to the square of the flux reversal in the armature

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Enquiry is from Design Steps and Considerations in portion Design of Permanent Magnet (PM) DC Motors of Design of Electrical Machines

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The correct answer is (a) number of poles is directly proportional to the flux reversal in the armature

Explanation: The first design consideration in the PMDC motor is the number of poles. The flux reversal in the armature is directly proportional to the number of poles.

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