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3 answers

http://www.makezine.com/blog/archive/2006/09/how_to_magnosniffer_magnetic_s.html

2007-08-24 06:16:51 · answer #1 · answered by dogsafire 7 · 1 0

The purpose is proximity.When a magnet is close near an object(ferro) its magnetic field waves.We can alert a device.

2007-08-24 09:09:37 · answer #2 · answered by Tuncay U 6 · 0 0

Off the top of my head I'm going to guess that it is used to sense magnetic fields? Perhaps to avoid damage to magnetic media such as computer disks?

2007-08-24 09:01:57 · answer #3 · answered by dansinger61 6 · 0 0

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