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Explain why the core of an electromagnet should be soft and not of steel?
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Explain why the core of an electromagnet should be soft and not of ste...
The core of an electromagnet should be soft iron because it is magnetised only when the current is passing through it and it stops as the current passed also stops.


 
Iron has two advantages:
• It has a far greater magnetic permeability than steel, meaning it provides a stronger magnetic field for a given magnetisation current (up to saturation) 
• It has a much lower retentivity than steel - when the current is switched off the remaining field strength is very weak.(objects held by iron will be released but probably held by the significant 'permanent' field retained by steel.)

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Explain why the core of an electromagnet should be soft and not of steel?
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