Define magnetic permeability. State and explain the factors affecting permeability of magnetic materials
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Permeability : The capability of the magnetic material to conduct the magnetic flux is known as permeability. Permeability and hysteresis loss are inversely related to each other.


Factors affecting permeability and hysteresis loss are 

o Physical condition of sample. The crystals of a ferromagnetic material when cold worked experience deformation as a result of which the material have very poor magnetic properties due to the internal strains on domains greater magnetic field is required to give definite magnetization. The permeability decreases and hysteresis loss is increased. 

o Chemical purity of the sample. The main impurities in the magnetic materials used are C, S, O and N, impurities affect the geometric pattern of the crystals and are harmful to the magnetic property. 

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