State Gauss ' s law of magnetism. Explain its significance

The net magnetic flux out of any closed surface is zero, according to the Gauss law of magnetism. That is, the number of magnetic field lines entering and leaving any closed surface is equal. It essentially states that magnetic monopoles do not exist. Every closed surface has magnetic flux in the inward direction to the south pole and equal flux in the outward direction to the north pole for a dipole. Since magnetic flux is not zero in the case of mono poles, it is a fact that mono poles do not exist.

The susceptibility of a magnetic material is 0 · 9853 . Identify the type of magnetic material. Draw the modification of the field pattern on keeping a piece of this material in a uniform magnetic field.

We are given that the susceptibility of a magnetic material, χ = 0 · 9853 The susceptibility of paramagnetic materials lies within the range of 0 < χ < 1 The susceptibility of the given material is small and positive. Thus, the given material is paramagnetic. When a piece of paramagnetic material is placed in a magnetising field, the magnetic field lines pass through the material rather than through the air. The field pattern around the paramagnetic material kept in a uniform magnetic field is given below: