1. Tardigrade
  2. Question
  3. Physics
  4. A steel wire of length l has a magnetic moment M. It is bent in L - shape (Figure). The new magnetic moment is <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-bxdq330b2di2sfxg.jpg />

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A steel wire of length $l$ has a magnetic moment M. It is bent in L - shape (Figure). The new magnetic moment is
Question

NTA AbhyasNTA Abhyas 2022

Solution:

Magnetic moment, $M=ml$
$\frac{M}{l}=m,$ where m is the pole strength. Therefore distance between poles
$= \, \sqrt{\left(\frac{l}{2}\right)^{2} + \left(\frac{l}{2}\right)^{2}}=\frac{l}{\sqrt{2}}$
So, $M^{′}=\frac{m l}{\sqrt{2}}=\frac{M}{\sqrt{2}}$