A rod of tranverse section `3 xx 10^(-6)m^(2)` is magnetized lengthwise to saturation by a strong magnetic field. The magnetic moment of each atom of the material of the rod is `10 mu_(B)` (`mu_(B)` is the Bohr magnetic) . Calculate the pole strength of the rod if its length is 10cm . There are `5 xx 10^(21)` atoms per unit volume of the rod. `(mu_(B)=9.2 xx 10^(-24)Am^(2))`