The field due to a magnet at a distance $ R$  from the centre of the magnet is proportional to

What is pole strength of a bar magnet ? Show the magnetic dipole moment in terms of pole strength.

The magnetic moment of the arrangement shown in the figure is …………. $M$

Points $A$ and $B$ are situated perpendicular to the axis of a $2\,cm$  long bar magnet at large distances $X$ and $3X$  from its centre on opposite sides. The ratio of the magnetic fields at $ A$ and $B$  will be approximately equal to

Two identical bar magnets with a length $10 \,cm $ and weight $50 \,gm$-weight are arranged freely with their like poles facing in a inverted vertical glass tube. The upper magnet hangs in the air above the lower one so that the distance between the nearest pole of the magnet is $3\,mm.$ Pole strength of the poles of each magnet will be…….$ amp × m$