The length of a magnet of moment $5\,A{m^2}$ is $14\,cm$. The magnetic induction of a point, equidistance from both the poles is {\rm{3}}.{\rm{2}}{\mkern 1mu}  imes {\mkern 1mu} {\rm{1}}{{\rm{0}}^{ - 5}}\,\,{\rm{wb/}}{{\rm{m}}^2}. The distance of the point from either pole is.

The magnetic induction field strength at a distance $0.2\,m$  on the axial line of a short bar magnet of moment $3.6\,A{m^2}$ is

The magnetic field due to a short magnet at a point on its axis at distance $X\;cm$ from the middle point of the magnet is $200\;gauss$. The magnetic field at a point on the neutral axis at a distance $X\;cm$ from the middle of the magnet is

A bar magnet of magnetic moment $M$ is bent into a semicircle. The new magnetic moment is:

The magnetic potential at a point on the axial line of a bar magnet of dipole moment $M$ is $V$. What is the magnetic potential due to a bar magnet of dipole moment $\frac{M}{4}$ at the same point

Two identical short bar magnets, each of magnetic moment $M$, are placed perpendicular to each other at a distance $d$ apart. The magnetic field at a point midway between them on the line joining their centers is:

Ratio of magnetic intensities for an axial point and a point on broad side-on position at equal distance $d$ from the centre of magnet will be or The magnetic field at a distance $d$ from a short bar magnet in longitudinal and transverse positions are in the ratio

A bar magnet is cut into two equal halves along its length. The magnetic dipole moment of each half is:

Two identical short bar magnets, each having magnetic moment $M$, are placed a distance of $2d$ apart with axes perpendicular to each other in a horizontal plane. The magnetic induction at a point midway between them is

Force between two identical short bar magnets whose centers are $r$ metre apart is 8.1 N, when their axes are along the same line. If separation is increased to 3 $r$ and the axis are rearranged perpendicularly, the force between them would become

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