Write you properties of a material suitable for making a permanent magnet and electromagnet
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Material like Steel can be used to make permanent magnet and identity used to make electromagnet since it loses its magnetism when current is switched off naturally Nickel and Cobalt are also permanent magnet
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Permanent magnetic material have high retentivity, the magnet is strong and has high coercivity so as to withstand against stray magnetic fields, temperature fluctations or minor mechanical damage. steel is one favoured choice.
Core of electromagnet are made of ferromagnetic materials which have high permeability and low retentivity.Soft iron is an example of electromagnets used in electric bells and speakers.
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