Questions tagged [magnets]

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12
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3answers
6k views

Can a magnetic lock be negated or overcome by a stronger electromagnet?

Magnetic locks seem to be fairly common on the doors of modern buildings, but I question their reliability when compared to a traditional, mechanical lock. I realize that the strength that it would ...
3
votes
1answer
263 views

How does a Levitron work?

I just watched this video: https://www.facebook.com/HigherPerspective/videos/1162007547164896/ I don't understand what I see. If the spinner's magnetic, the bowl is made of iron and that the wood ...
1
vote
0answers
66 views

Does the Hyperloop One suspension require constant current through copper windings?

As a follow-up to How does the pressurized suspension of the Hyperloop not affect the tube pressure?, I believe (though I can't find where I read it now) that the Virgin Hyperloop One implementation ...
0
votes
2answers
97 views

Is there a device like this? [closed]

I would like to get my hands on a mechanically-set timer (wind up is fine, so that it's self-powered) which sends a small electrical pulse to a mag-lock once the timer goes off, thus causing the mag-...