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:

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 needle of a deflection galvanometer shows a deflection of $60^\circ$ due to a short bar magnet at a certain distance in tan $A$ position. If the distance is double the deflection is

Direction of magnetic field at equatorial point is

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

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

A bar magnet is $10\;cm$ long, and is kept with its north (N)- pole pointing north. A neutral point is formed at a distance of $15\;cm$ from each pole. Given the horizontal component of earth’s field to be 0.4 Gauss, the pole strength of the magnet 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

A magnet of magnetic moment $50\,\hat i\,A{m^2}$ is placed in magnetic field $\vec B = \left( {0.5\,\hat i + 0.3\,\,\hat i} \right)T$. Torque acting on the magnet is