A wire of magnetic material of length '2L' and magnetic moment 'M' is bent at the centre to form 'L' shaped…

A wire of magnetic material of length '2L' and magnetic moment 'M' is bent at the centre to form 'L' shaped wire. Its magnetic moment is
  1. $\frac{\text { M }}{\sqrt{2}}$
  2. M
  3. $\frac{\text { M }}{\sqrt{3}}$
  4. $\frac{\text { M }}{2}$

Solution

Each half of the needle will possess a dipole moment $\frac{\vec{M}}{2}$. Now, the $L$ shape is equivalent to two dipole arranged perpendicular to each other . So, effective dipole moment is given by

Asked in: MHT CET 2020 (15 Oct Shift 1)

Practice more Magnetic Effects of Current questions on Aicharya