explain why soft iron cannot be used to make a permanent magnet
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Materials for making permanent magnets should have high coercivity so that magnetisation is not erased by stray magnetic fields, temperature fluctuations or minor mechanical damages. Soft iron/pure iron has much smaller coercivity
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Answer: As the soft Iron cannot retain the electro magnetism after electric flow is stopped in the coil wound around the soft iron soft iron not used for making a permanent magnet. so the permanent magnets are made by the magnetic substances which can retain magnetism and have more retentivity like steel.
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