Two short magnets of equal dipole moments $M $ are fastened perpendicularly at their centre (figure). The magnitude of the magnetic field at a distance $d $ from the centre on the bisector of the right angle is
$\frac{{{\mu _0}}}{{4\pi }}\frac{M}{{{d^3}}}$
$\frac{{{\mu _0}}}{{4\pi }}\frac{{M\sqrt 2 }}{{{d^3}}}$
$\frac{{{\mu _0}}}{{4\pi }}\frac{{2\sqrt 2 M}}{{{d^3}}}$
$\frac{{{\mu _0}}}{{4\pi }}\frac{{2M}}{{{d^3}}}$
A bar magnet of length $6\,cm$ has a magnetic moment of $4\,J\,T^{-1}$. Find the strength of magnetic field at a distance of $200\,cm$ from the centre of the magnet along its equatorial line.
The mid points of two small magnetic dipoles of length $d$ in end-on positions, are separated by a distance $x, (x > > d)$. The force between them is proportional to $x^{-n}$ where $n$ is
Due to a small magnet intensity at a distance $x$ in the end on position is $9$ $Gauss$. What will be the intensity at a distance $\frac{x}{2}$ on broad side on position..... $Gauss$
The distance of two points on the axis of a magnet from its centre is $10 \,cm$ and $20 \,cm$ respectively. The ratio of magnetic intensity at these points is $12.5 : 1. $ The length of the magnet will be......$cm$
Due to a small magnet, intensity at a distance $x$ in the end on position is $9$ $gauss$ . What will be the intensity at a distance $\frac{x}{2}$ on broad side on position....$gauss$