A circular coil of radius 10 cm and 100 turns carries a current 1 A . What is the magnetic moment of the coil?

Question

A circular coil of radius 10 cm and 100 turns carries a current 1 A . What is the magnetic moment of the coil?, 3.142 × 10 4 A m 2, 10 4 A m 2, 3.142 A m 2, 3 A m 2

MARKS App · Accepted Answer

Given, Radius of coil r = 10 × 10 - 2 m Number of turns N = 100 turn, Current in coil i = 1 A Magnetic moment M = ? By magnetic dipole moment of current loop M = N i A , where A = π r 2 M = N i . π r 2 = 100 × 1 × 3.142 × 10 × 10 - 2 2 = 100 × 3.142 × 100 × 10 - 4 = 3.142 A m 2

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