question_answer

Direction: Q.35 to Q.40

When the atomic dipoles are aligned partially or fully, there is a net magnetic moment in the direction of the field in any small volume of the material. The actual magnetic field inside material placed in magnetic field is the sum of the applied magnetic field and the magnetic field due to magnetisation. This field is called magnetic intensity (H).

\[H=\frac{B}{{{\mu }_{0}}}-M\]

where M is the magnetisation of the material, \[{{\mu }_{0}}\] is the permittivity of vacuum and B is the total magnetic field. The measure that tells us how a magnetic material responds to an external field is given by a dimensionless quantity is appropriately called the magnetic susceptibility: for a certain class of magnetic materials, intensity of magnetisation is directly proportional to the magnetic intensity.

Read the given passage carefully and give the answer of the following questions:

Magnetisation of a sample is:

A) volume of sample per unit magnetic moment.

B) net magnetic moment per unit volume.

C) ratio of magnetic moment and pole strength.

D) ratio of pole strength to magnetic moment.