Simon Bisson (sbisson) wrote,
Simon Bisson

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Fun with electromagnetism: coin shrinking

Magnetic fields are strange and powerful things, that can have a considerable effect on the physical world - especially when delivered at high powers over a very short time scale. It's relatively easy to pack a lot of energy into a very short burst (which is one of the things I used to model when I used to write electromagnetic design software).

But this is just cool: using EM to crush coins, by a process called "Electromagnetic Forming" or "Magneforming". A capacitor bank is discharged thrugh a coil which contains the item being shrunk.

There's also an interesting discussion that results, trying to model longitudial stresses and forces using Ampere rather than Maxwell...
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