A bar magnet 20 cm in length is placed with it south pole towards geographic north. The neutral points are situated at a distance of 40 cm from centre of the magnet.

If horizontal component of earth’s field $= 3.2 imes {10^{ - 5}}$ T, then pole strength of magnet is

A bar magnet is cut into two equal pieces along its length. The magnetic moment of each piece becomes:

A short bar magnet placed with its axis at 30° with an external field of 800 G experiences a torque of 0.016 Nm. The magnetic moment of the magnet 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

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.

Breaking a bar magnet in half results in:

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

A small bar magnet has a magnetic moment $1.2\;A$-${m^2}.$ The magnetic field at a distance $0.1\;m$ on it axis will be: $({\mu _0} = 4\pi imes {10^{ - 7}}$-$m/A)$

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

The magnetic field at a point $x$ on the axis of a small bar magnet is equal to the field at a point y on the equator of the same magnet. The ratio of the distances of $x$ and $y$ from the centre of the magnet 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