Question: Q . 4 . An iron ring has a mean circumference of 5 0 cm has an air gap of 4 mm cut in it

Q.4. An iron ring has a mean circumference of 50 cm has an air gap of 4 mm cut in it. It has circular cross section of area of 5cm2. It is wound uniformly with a coil of 750 turns. The relative Permeability of the iron is 780. If the coil carries a current of 5 A , Find the flux in the air gap.
Q . 4 . An iron ring has a mean circumference of

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