Question

The magnetic moment of a current I carrying circular coil of radius r and number of turns N varies as

• A. $\frac { 1 } { \mathrm { r } ^ { 2 } }$
• B. $\frac { 1 } { \mathrm { r } }$
• C. r
• D. $\mathbf { r } ^ { 2 }$

Answer 1

Answer: (D)

$\mathbf { r } ^ { 2 }$

Answer 2

Magnetic moment M = NIA =