Seudónimo Seudónimo
  • 24-01-2016
  • Physics
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How can you make a magnet that turns on and off

Respuesta :

AL2006
AL2006 AL2006
  • 25-01-2016

You can't turn off a 'permanent' magnet ... a piece of iron that's
magnetized.

An electromagnet can be turned on and off.  It's only magnetic
when electric current flows through the wire that's wrapped
around it.  The wire is connected to a battery or other power
supply.  So if there's a switch in the wire, the electromagnet
can be switched on and off.
Answer Link

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