What is the Difference Between Magnetic Intensity and Intensity of Magnetisation?

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The key difference between magnetic intensity and intensity of magnetization lies in their definitions and the parameters they describe:

  • Magnetic Intensity (H): This is a quantity used to describe the magnetic field. It represents the magnetic field strength at a particular place and is defined as the magnetic dipoles per unit of volume. The formula for magnetic intensity is H = (μ0/4π) (M/r^3).
  • Intensity of Magnetization (I): This refers to the change in the magnetic moment of a magnet per unit volume. It is defined as the net magnetic moment acquired per unit volume of a specimen. The formula for the determination of intensity of magnetization is I = M/V, where I is the intensity of magnetization, M is the magnetic moment, and V is the volume.

In summary, magnetic intensity is a quantity used to describe the strength of a magnetic field, while the intensity of magnetization describes the change in the magnetic moment of a magnet per unit volume.

Comparative Table: Magnetic Intensity vs Intensity of Magnetisation

The main difference between magnetic intensity and intensity of magnetization lies in their definitions and applications. Here is a table comparing the two concepts:

Property Magnetic Intensity Intensity of Magnetization
Definition Magnetic intensity defines the forces that the poles of a magnet experience in a magnetic field. Intensity of magnetization describes the net magnetic moment acquired per unit volume of a specimen.
Unit of Measurement Not applicable (force) Ampere per meter (A/m)
Direction Similar to the direction of the magnetic field. Similar to the direction of the magnetic moment.
Dependence Independent of the nature of the material and temperature. Dependent on the nature of the material and temperature.
Formula Not applicable (force) M = mnetV, where M is the intensity of magnetization, V is the volume of the specimen, and mnet is the net magnetic moment.

In summary, magnetic intensity is a force that describes the interaction between magnets and magnetic fields, while intensity of magnetization is a vector quantity that represents the net magnetic moment per unit volume of a specimen. The intensity of magnetization depends on the material's properties and temperature, whereas magnetic intensity is independent of these factors.