Naked Science Forum

On the Lighter Side => Science Experiments => Topic started by: Ru Ko on 24/03/2019 02:32:31

Title: Why does a magnet dropped through a copper pipe move so slowly?
Post by: Ru Ko on 24/03/2019 02:32:31

When a powerful  rare earth magnet is dropped through a copper pipe it moves very slowly through it. Is it because the electric/magnetic field generated by the magnet in the copper pipe is in opposition to the magnetic field (like pole) or is it attraction (unlike pole) to the magnet? In other words is it attraction or repulsion that slows the magnet?

Title: Re: Why does a magnet dropped through a copper pipe move so slowly?
Post by: Kryptid on 24/03/2019 03:28:53

It's both attraction and repulsion at the same time:

Title: Re: Why does a magnet dropped through a copper pipe move so slowly?
Post by: Ru Ko on 24/03/2019 17:11:47

Thanks very. much.

Title: Re: Why does a magnet dropped through a copper pipe move so slowly?
Post by: Petrochemicals on 02/04/2019 12:07:54

Thanks for that both, this is facinating,

I have found this one, given that the magnet does not drop, where is the heat energy coming from ?

Edit

It may be that noise in the background i hadnt noticed before.

Title: Re: Why does a magnet dropped through a copper pipe move so slowly?
Post by: Bored chemist on 02/04/2019 19:47:14

Quote from: Petrochemicals on 02/04/2019 12:07:54

where is the heat energy coming from ?

Quote from: Petrochemicals on 02/04/2019 12:07:54

It may be that noise in the background i hadnt noticed before.

The noise and the heat come from a high power radio frequency oscillator.


This version of the video is less misleading.