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by DonHopkins 2668 days ago
I can't wait for the wireless charger that lives up to the name "Tesla".
2 comments

People might find it slightly inconvenient when their keys get torn from their pants and watches ripped from their wrists every time they charge their car.
It's not really a Tesla until it rips out your pacemaker.
Tesla used electric fields, not magnetic ones, for his wireless power tests..
Last I heard, electric fields and magnetic fields were inextricably related.

https://www.realclearscience.com/articles/2014/01/29/how_tes...

>The power of the Tesla coil lies in a process called electromagnetic induction, i.e., a changing magnetic field creates an electric potential that compels current to flow. Conversely, flowing electric current generates a magnetic field. When electricity flows through a wound up coil of wire, it generates a magnetic field that fills the area around the coil in a particular pattern, shown with lines below: [...]

>Eventually so much charge has accumulated that it breaks down the electrical neutrality of the air in the middle of the spark gap. The circuit closes for a fleeting second and a huge amount of current blasts out of the capacitor and through the coils. This produces a very strong magnetic field in the primary coil.

Which leads us to ask: Fucking magnets: How do they work?

https://www.youtube.com/watch?v=_-agl0pOQfs

That's true enough, but a large electric field can wirelessly power a fluorescent light bulb, without moving your key ring at all.
So a “Tesla coil”? ;)