(a) State Gauss’s law for magnetism. Explain its significance. (b) Write the four important properties of the magnetic field lines due to a bar magnet. OR Write three points of differences between para-, dia- and ferro- magnetic materials, giving one example for each.

Question

Philoid · Accepted Answer

(a)

Gauss’s law for magnetism states that there the total magnetic flux through a closed surface is always zero. Mathematically, . This is the same as saying that monopoles do not exist.

(b)

The magnetic field lines due to a bar magnetic have the following four properties:

(i) The magnetic field lines due to a bar magnet form continuous closed loops.

(ii) The magnetic field lines due to a bar magnet never intersect each other.

(iii) The tangent to the field line at a given point gives the direction of magnetic field at that point.

(iv) The number of field lines crossing per unit area is proportional to the magnitude of the magnetic field.

OR

(a) State Gauss’s law for magnetism. Explain its significance.(b) Write the four important properties of the magnetic field lines due to a bar magnet.ORWrite three points of differences between para-, dia- and ferro- magnetic materials, giving one example for each.

(a) State Gauss’s law for magnetism. Explain its significance.
(b) Write the four important properties of the magnetic field lines due to a bar magnet.

OR

Write three points of differences between para-, dia- and ferro- magnetic materials, giving one example for each.