Question 9. A coil of 300 turns is wound uniformly on a ring of non-magnetic material. The ring has a mean circumference

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Question 9 A Coil Of 300 Turns Is Wound Uniformly On A Ring Of Non Magnetic Material The Ring Has A Mean Circumference 1 (69.56 KiB) Viewed 58 times

Question 9. A coil of 300 turns is wound uniformly on a ring of non-magnetic material. The ring has a mean circumference of 40 cm and a uniform cross-sectional of 4 cm². If the current in the coil is 5 A. Calculate: [5] NI H= a) The magnetic field strength, -7 b) The flux density, and c) The total magnetic flux in the ring. 4xx10 Question 10. An iron ring of mean diameter 10 cm is uniformly wound with 200 turns of wire. When a current of 0.25 A is passed through the coil a flux density of 0.4 T is set up in the iron. Find: [5] a) The magnetising force, and b) The relative permeability of the iron under these conditions. PON