A magnetic dipole of moment $M$ is aligned at an angle $heta$ with a uniform magnetic field $B$. The work done in rotating it by an angle $dheta$ is:

The deflection magnetometer is most sensitive when deflection ${\rm{heta }}$ is

The magnetic field lines due to a bar magnet:

A short magnet of moment $6.75\;A{m^2}$ produces a neutral point on its axis. If horizontal component of earth’s magnetic field is $5 imes {10^{ - 5}}Wb/{m^2}$, then the distance of the neutral point should be

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

Which of the following is NOT a property of magnetic field lines?

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:

A short bar magnet is placed with its north pole pointing towards geographic north. The neutral point is located:

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:

The points $A\;{\rm{and}}\;B$ are situated perpendicular to the axis of 2 cm long bar magnet at large distances $x$ and 3$x$ from the centre on opposite sides. The ratio of magnetic fields at $A\;{\rm{and}}\;B$ will be approximately equal to

The magnetic field is strongest at which point of a bar magnet?