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What factors does the value of magnetizing current depend on?

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in Design of Electrical Machines by (687k points)
What factors does the value of magnetizing current depend on?

(a) flux tube

(b) output power

(c) mean mmf

(d) mean mmf and flux tube

This question was addressed to me in examination.

Question is from No Load Current topic in division Three Phase Induction Motor of Design of Electrical Machines

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Correct option is (d) mean mmf and flux tube

Easiest explanation: If the permeability of iron were constant this would cause no difficulty. The value of magnetizing current would be accurately obtained by considering the mean mmf and the flux tube where this mean occurs.

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