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Mail Archives: geda-user/2012/03/16/10:02:52

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Date: Fri, 16 Mar 2012 10:02:02 -0400
Message-ID: <CALSZ9gp3RUu2WiEU9SoJROD+3LQcF3XR4YKJiKP1P-U2OWM4-Q@mail.gmail.com>
Subject: [geda-user] Daughter's Science Fair
From: Rob Butts <r DOT butts2 AT gmail DOT com>
To: geda-user AT delorie DOT com
Reply-To: geda-user AT delorie DOT com

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My nine-year-old daughter has a science fair tomorrow.  We are doing simple
electromagnets out of nails.  We are just using one C battery with
approximately a 30-penny nail and 26 guage wire wrapped around the nail for
two layers.  When the battery is connected the nail has a good magnetic
strength in that it will pick up another nail not just paper clips.

I was thinking about showing how a current in one coil will induce a
current in another (how an electric toothbrush charges).  We rigged up
another nail the same way but with a little bulb attached.  Check my
theory, shouldn't the electromagnetic field produced by the coil and nail
with the battery induce a current in the other coil when placing the nails
adjacent and parallel?

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<div>My nine-year-old daughter has a science fair tomorrow.=A0 We are doing=
 simple electromagnets out of nails.=A0 We are just using one C battery wit=
h approximately a=A030-penny nail and 26 guage wire wrapped around the nail=
 for two layers.=A0 When the battery is connected the nail has a good magne=
tic strength in that it will pick up another nail not just paper clips.</di=
v>
<div>=A0</div><div>I was thinking about showing how a current in one coil w=
ill induce a current in another (how an electric toothbrush charges).=A0 We=
 rigged up another nail the same way but with a little bulb attached.=A0 Ch=
eck my theory, shouldn&#39;t the electromagnetic field produced by the coil=
 and nail with the battery induce a current in the other coil when placing =
the nails adjacent and=A0parallel?</div>

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