Coils, Coils, Coils!
Wrap a wire around practically anything and you’ve got a coil!
This lesson introduces the idea of a coil and explores electromagnets.
The kit provides magnet wire, battery band, sand paper and nail.
A compass (you can make one), extra paperclips and battery are not provided.
a clean flat area to do the projects:
and you’ve got a --
a light flashing generator and a working radio.
building these
inventions with coils,
take some time
to revisit . . .
temporary magnets
with electricity.
the bolt or nail,
at least 30 times.
The wound
wire
is called
a COIL.
wire at each end.
of the wire
with sandpaper.
by slipping them under the rubber band.
Does the electromagnet
pick up more or less paperclips
the number of
paperclips
you can pick up
with the nail.
with electricity!
Click here to make a compass
to the battery.
What happens to the poles
of the electromagnet?
makes the stronger electromagnet
electromagnets
is stronger
1.5V
1.5V
1.5V
3V
You can turn off your electromagnet by pulling one of the wires
away from the battery.
stays magnetized.
Can you guess why?
Electromagnets can lift huge loads of iron and steel.
over the
compass.
for each arrangement of the wire?
end of the wire to the other battery terminal.
of the bare
wire firmly against
one terminal
of the battery.
to the compass and repeat 2-3.
Then try wrapping the wire
around the compass, as show.
in a wire, what happens around the wire
to make a magnet
you could turn ON and OFF
the number of turns
in a coil, what happens
to the electromagnet
