# Encyclopedia Magnetica

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file:bar_magnets_polarity_n_magnetica_jpg

Magnetic force due to magnetic poles, from left to right: like poles repel (position of the hanging bar magnet is deflected accordingly), opposite poles attract, nail (soft ferromagnetic material) gets magnetised and always attracted to any pole of a magnet, the force on non-magnetic materials such as plastic and copper (without electric current) is typically negligible, electromagnetic coil with current can repel or attract the magnet (depending on the polarity of current), and the force on non-magnetic stainless steel (e.g. type 316) is negligibly small.

bar_magnets_polarity_n_magnetica.jpg

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S. Zurek, Encyclopedia Magnetica, CC-BY-4.0

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