Question

Define magnetization state its SI unit and dimensions. Derive the relation between
magnetic field intensity (H) and magnetization (M) for a magnetic material placed
in a magnetic field​

Answer 1

Explanation:

Any device which has magnetic north pole and south pole on opposite sides is known as a magnetic dipole. It can be a bar magnet, a bar electromagnet, a current carrying ring or a solenoid etc.

The strength of a pole of a dipole is called pole strength. Its SI unit is ampere.metre A.m, and denoted by m.

In any dipole the pole strength of both the poles are always equal. The product of the strength of one of the poles and the distance between the poles is known as magnetic dipole moment. It is denoted by M and its SI unit is ampere.metre

2

Am

2

.

When a magnetic material like iron is placed in a magnetic field, it gets a magnetic dipole moment. The magnetic dipole moment acquired per unit volume is known as magnetisation. Its SI unit will be

m

3

Am

2

=

m

A

.

Its dimension is [L

−1

M

0

T

0

I

1

].

Answer 2

Answer:

The magnetization of a material may be defined as the net magnetic moment per unit volume of the material.

Formula : M(vector) = M(net vector)/V

SI unit : =A/m. (Ampere per meter)

Explanation:

Magnetic intensity and magnetization are related by the relation

M=χH

Also μ=μ0(1+χ)=μr μ0

⟹μ r =1+χ