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Magnetic Induction
When a magnetic material, say iron, is placed within a magnetic field, H, the magnetic material will produce its own magnetization. This phenomena is called induced magnetization.
In practice, the induced magnetic field (that is, the one produced by the magnetic material) will look like it is being created by a series of magnetic dipoles located within the magnetic material and oriented parallel to the direction of the inducing field, H.
The strength of the magnetic field induced by the magnetic material due to the inducing field is called the intensity of magnetization, I.
