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When is the formula for the flux per pole?

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When is the formula for the flux per pole?

(a) flux per pole = average magnetic field * pole pitch * length of the core

(b) flux per pole = average magnetic field / pole pitch * length of the core

(c) flux per pole = average magnetic field * pole pitch / length of the core

(d) flux per pole = 1 / average magnetic field * pole pitch * length of the core

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Enquiry is from Armature Design in portion Design of Synchronous Machines of Design of Electrical Machines

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The correct answer is (a) flux per pole = average magnetic field * pole pitch * length of the core

The best explanation: To obtain the value of flux per pole first the average magnetic field is obtained. Then the pole pitch and the length of the core is obtained to obtain the flux per pole.

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