Each ferromagnetic material has a remanence in its magnetic characteristics, but they are not all suitable to be used in a permanent magnet motor! Explain why? And show the required magnetic characteristics suitable for that job. This question is about specialized machines
Q3: Each ferromagnetic material has a remanence in its magnetic characteristics, but they are not all suitable to be used in a permanent magnet motor! Explain why? And show the required magnetic characteristics suitable for that job.
This question is about specialized machines
Ferromagnetic materials are those which get spontaneously magnetize even in the absence of external field.
These materials are characterized the parallel alignment of the dipoles in a single direction.
These materials are having very large and positive value of susceptibility.
These materials gets strongly magnetized in the direction of magnetic field which means when the external field is removed then these materials do not lose their magnetism.
These materials are having high value of retentivity and coercivity so they are used in making permanent magnets.
Examples of these materials are :
Iron (Fe),Nickel(Ni),Cobalt(Co).
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