WEBVTT

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Hello, here is a magnet with its 2 poles North and South, a steel screwdriver, an iron nail

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The screwdriver is not magnetized, it does not attract the nail!

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I rub the screwdriver on 1 pole (South here): it now behaves like a magnet!

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If we use the other pole, then North, same observation!

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Summary: South or North, both poles can magnetize the steel screwdriver!

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To cancel the magnetism in steel, I have to realize a coercive magnetic field alternating North and South ...

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... By removing the steel gradually in order to decrease the induced magnetic intensity

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There is no more magnetisation!

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I started the experiment again because there was still some field in the steel screwdriver. You have to apply :-)!

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The compass is a magnet, so it always reacts face up with screwdriver!

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Demonstration of a commercial object to magnetize and demagnetize: easier to succeed :-)!

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Thank you !