Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
0 votes

A wire of length $\ell$ carrying a current $i$ is bent to form a circle. Its magnetic moment is

$\begin {array} {1 1} (a)\;\large\frac{\ell i^2}{\pi} & \quad (b)\;\large\frac{\ell i^2}{4\pi} \\ (c)\;\large\frac{\ell^2 i}{\pi} & \quad (d)\;\large\frac{\ell^2 i}{4\pi} \end {array}$


Can you answer this question?

1 Answer

0 votes
Magnetic moment $= i A$
A=$\pi R^2$
$R = \large\frac{\ell}{2 \pi}$
Ans : (d)


answered Feb 21, 2014 by thanvigandhi_1
edited Sep 19, 2014 by thagee.vedartham

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App