Question

In the question number $73$, for the coil given the magnetic moment is

• A. $12.95A{m}^2$
• B. $25.79A{m}^2$
• C. $10.05A{m}^2$
• D. $24.79A{m}^2$

Answer 1

Answer: (C)

The magnetic moment is given by
$m=NIA$
$=NI\pi r^2=100\times 3.2\times 3.14\times (10\times 10^{-2}{)}^2$
$=100\times 3.2\times 3.14\times 10^{-2}$
$=10A{m}^2$