A circular coil of 50 turns and radius 20 cm carries a current of 12 A . Find magnetic moment associated with it:

Question

A circular coil of 50 turns and radius 20 cm carries a current of 12 A . Find magnetic moment associated with it: (A) 72.5 Am 2 (B) 75.4 Am 2 (C) 76.6 Am 2 (D) 70 Am 2

Tardigrade Admin · Accepted Answer

M = N I A M = N I (π R 2) =50 × 12 π(0.2)2 =50 × 12 × 3.14 × 0.04 =75.4 Am 2

Q. A circular coil of 50 turns and radius $20 c m$ carries a current of $12 A .$ Find magnetic moment associated with it:

$72.5 A m^{2}$

$75.4 A m^{2}$

$76.6 A m^{2}$

$70 A m^{2}$

$M = N I A$
$M = N I (π R^{2})$
$= 50 \times 12 π (0.2)^{2}$
$= 50 \times 12 \times 3.14 \times 0.04$
$= 75.4 A m^{2}$

Q. A circular coil of 50 turns and radius 20cm carries a current of 12A. Find magnetic moment associated with it:

72.5Am2

75.4Am2

76.6Am2

70Am2