what happens to the magnetic strength of steel iron nail and soft iron wrapped on copper coil turn off
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what happens to the magnetic strength of steel iron nail and soft iron wrapped on copper coil turn off
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Answer:
An iron core makes a temporary electromagnet. It loses its magnetism as soon as the switch is opened and the current is switched off. A steel core makes a more permanent magnet. It does not lose its magnetism quickly when the current is switched off.