Physics Girl - Exploding soda cans with electromagnets in SLOW MOTION ft Joe Hanson

Et l'explication de Timo sur la vidéo (lehollandaisvolant.net/?id=20160615184925)

Pour résumer, car l’induction électrique c’est quelque peu le rude-goldberg de la science :
– une canette est placée au centre d’une bobine.
– on envoie une impulsion de courant dans une bobine
– le courant induit un champ magnétique autour de la bobine
– ce champ magnétique va induire un courant électrique dans la canette
– ce courant lui-même va produire un champ magnétique (secondaire) et opposé au premier
– les deux champs magnétiques vont se repousser et peuvent alors mettre en mouvement leur support (bobine et canette, ici).

Ici, la canette est prise au piège dans la bobine et elle s’écrase sur elle-même.
Si l’impulsion est assez brève (ou si le courant est alternatif) l’écrasement de la canette sera suffisamment rapide pour couper la canette en deux de façon violente.

Source:

Exploding soda cans with electromagnets in SLOW MOTION ft Joe Hanson

La vidéo:

Crédits:

14 juin 2016

Making Music with a Tesla Coil: https://youtu.be/KGhNgeg9IAw

Watch a soda can rip itself apart in a fiery explosion at 11,000fps with a Phantom high speed camera. Running a current through a coil, produces an electromagnet. Turn up the voltage in this experiment, and make that current strong enough, and your electromagnet can rip a soda can in half. Or rather, make the can rip itself in half! This video was filmed at Arc Attack Studios in Austin, TX with Joe Hanson, Joe DiPrima, John DiPrima and Darren Dyk.

This video is sponsored by Audible - http://audible.com/physicsgirl

360 Tesla Coil Video:
https://youtu.be/2SNcbNlbyVo
It’s Okay to Be Smart Channel:
https://www.youtube.com/itsokaytobesmart

ArcAttack:
https://www.facebook.com/arc.attack/

Beyond Slow Motion:
https://www.youtube.com/user/BeyondSl...

Use Induction to make your own DIY Electric Train:
https://www.youtube.com/watch?v=9k7zy...

Creator: Dianna Cowern
Editor: Jabril Ashe
Animator: Kyle Norby

How the quarter shrinking demo works:
A coil of wire is wrapped around the quarter so it follows the edge of the quarter. Then a capacitor - kind of like a battery - is charged until it’s at a VERY high-voltage, which is then discharged through the wire. The current produced is high enough to make you go bye bye. The coil becomes an electromagnet - because current —≥ magnetic field But this magnetic field creates another current or set of currents in the quarter - because changing magnetic field —≥ current in a circuit. But moving charges, i.e. currents, in a magnetic field will feel a force. For the quarter, the charges moving in the edge are feeling a force inward. The current was SO strong that the quarter PULLED ITSELF inward! This is madness.

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Music: APM and YouTube
"On the Bach"
“Built Together Marimba“
“The Bumbling Professor“
“Built Together Soundscape“

Provided by ArcAttack:
“1812 Overture”

For Science!

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