Two short magnets of magnetic moment $1000{\mathrm{Am}}^2$ each are placed as shown at the corners of a square of side 10cm. The net magnetic induction at P is.  

Point P lies on equatorial line of magnet (1) and axial line of magnet (2) as shown.

${\mathrm{B}}_1=\frac{{\mathrm{\mu }}_0}{4\mathrm{\pi }}.\frac{\mathrm{M}}{{\mathrm{d}}^3}={10}^{-7}\times \frac{1000}{{(0.1)}^3}=0.1\mathrm{T}$

${\mathrm{B}}_2=\frac{{\mathrm{\mu }}_0}{4\mathrm{\pi }}.\frac{2\mathrm{M}}{{\mathrm{d}}^3}={10}^{-7}\times \frac{2\times 1000}{{(0.1)}^3}=0.2\mathrm{T}$

$\therefore {\mathrm{B}}_{\mathrm{net}}={\mathbf{B}}_2-{\mathrm{B}}_1=0.1\mathrm{T}.$