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Electromagnet
Did you know that electricity flowing
through a coiled wire around an iron nail becomes a temporary magnet?
The flow
of electricity through
wire from an energy source like a battery
is really a flow of electrons (from the negative side to the positive
side) and it creates a magnetic field around the wire.
This
is a temporary magnet because when you disconnect the wire from the
energy source the magnetic field
disappears. If you want a stronger magnetic field you can either loop
the wire, add an extra battery, coil
the wire around a metal that can be effected by a magnet (iron or steel), or you can do all three.
If you were to try this with really batteries, it would only last a
few minutes because connecting a wire from the positive to the
negative side of a battery will drain it (all the built up electrons
from the negative side will have gone the positive side).
Here is your
chance to try picking up paper clips with an electromagnet!!
Click
on the image below!!!
If asked for a password type "kronkover"
After the experiment click the arrow to continue!
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