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A Circular Coil of 250 Turns and Diameter 18 Cm Carries a Current Of 12a. What is the Magnitude of Magnetic Moment Associated With the Coil? - Physics

A circular coil of 250 turns and diameter 18 cm carries a current of 12A. What is the magnitude of magnetic moment associated with the coil?

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Solution

M = N I A where A =π r2 

∴ M = NI π r2
∴ M = 250 x 12 x 3.14 x 81 x10-4
∴ M = 76.30 A-m2

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