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 

Of the following Fig., the lines of magnetic induction due to a magnet $SN$, are given by

The magnetic moment of a magnet of length $10\, cm$  and pole strength $ 4.0\, Am$  will be……$A{m^2}$

Verify the Gauss’s law for magnetic field of a point dipole of dipole moment ${{\rm{\vec m}}}$ at the origin for the surface which is a sphere of radius $\mathrm{R}$.

Verify the Ampere’s law for magnetic field of a point dipole of dipole moment ${\rm{\vec M = M\hat k}}$. Take $\mathrm{C}$ as the closed curve running clockwise along : the $\mathrm{z}$ – axis from $\mathrm{z} = \mathrm{a} \,>\, 0$ to $\mathrm{z = R}$;