A magnet is placed in iron powder and then taken out, then maximum iron powder is at
Some away from north pole
Some away from south pole
The middle of the magnet
The end of the magnet
A small current element of length $d \ell$ and carrying current is placed at $(1,1,0)$ and is carrying current in ' $+ z$ ' direction. If magnetic field at origin be $\overrightarrow{ B }_1$ and at point $(2,2,0)$ be $\overrightarrow{ B }_2$ then
A long magnet is cut in two parts in such a way that the ratio of their lengths is $ 2 : 1. $ The ratio of pole strengths of both the section is
Write the difference between electric field lines and magnetic field lines.
In the case of bar magnet, lines of magnetic induction
Two magnets of equal mass are joined at right angles to each other as shown the magnet $1$ has a magnetic moment $3 $ times that of magnet $2$. This arrangement is pivoted so that it is free to rotate in the horizontal plane. In equilibrium what angle will the magnet $1$ subtend with the magnetic meridian