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"Metals, such as, tin and aluminum are then extracted by magnets. " umm, what? I know aluminum can be slightly magnetic under intense magnetic fields, but sur
by Zhenya 11y ago
"Metals, such as, tin and aluminum are then extracted by magnets. "
umm, what?
I know aluminum can be slightly magnetic under intense magnetic fields, but surely this isn't the case in this situation?
- pwg 11y agoThe article should have said: "by magnetic induction". An AC current driven electromagnet induces a current in the metal, the induced current in the metal also has a magnetic field (basic physics), and it is this magnetic field that is then used to "sort" the conductors (metals) from the non-conductors (non-metals). But then, the article was likely written by someone lacking an engineering/physics background, and so "extracted by magnets" was likely as much as they could comprehend of the process.