Datasheet-1

FOR ADVANCED USERS - ADULT SUPERVISION RECOMMENDED
Rubber Grommet
Iron Core Rod
Part B
This circuit shows how wrapping a wire into a coil concen-
trates the magnetic field from the wire. The more loops of
wire a coil has, the stronger the magnetic field produced. So
if you only loop the jumper wire around the iron core rod a
few times, the magnetic field will not be nearly as strong. You
can also see how looping the wire around an iron core in-
creases the magnetic field produced.
Your M3 electromag-
net is just like the coiled red wire except that it has many
more loops, giving it a stronger magnetic field.
Project 52
Better Wire Magnet
Build the circuit. Place the rubber grommet on one end of the iron core rod
and wrap the red jumper wire tightly around it, as shown. Connect the red
jumper wire to the circuit.
Turn on the slide switch (S1) and set the switcher (S6) to the top or bottom
position.
Move the iron core rod (with the red wire around it) around the compass
and watch how it attracts the compass needle.
Switch the switcher between the top and bottom positions and watch the com-
pass to see how the magnetic field has changed.
Part B: Now take off the rubber grommet and remove the iron core rod, but
keep the red wire wound in a coil and connected to the circuit. Push the press
switch and watch the compass while moving the coiled red wire around it.
Now the compass needle has much less attraction to the red wire.
How could you make this electromagnet more powerful?
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