Project 83
Swing the Magnet
Build the circuit shown and place
the iron core rod in the electro-
magnet (M3). Tie the magnet to a
string and hold it just above the
electromagnet, so that the magnet
is attracted to the iron core rod
without touching it. Flip the
switcher (S6) back and forth be-
tween its top and bottom positions
to reverse the electromagnet’s
magnetic field; the magnet flip
around each time.
Part A:
Use the preceding circuit. Secure the paper
clip-string with a weight above the circuit, as shown.
Set the switcher (S6) to the top or bottom position to
pull the paper clip towards the electromagnet. Attract
and release the paper clip using the switcher (top and
bottom positions are on, middle position is off).
Part B:
Secure the magnet in place with nothing be-
neath it. Tie a paper clip to the string and place it on
the magnet. Slowly pull the string away so the paper
clip is suspended in air. Hold the paper clip in place
with a weight, as shown.
Next, hold the magnet near the paper clip and lift it
off the ground, without it touching the magnet. Move
it around in mid-air.
Project 84
Magic Rope Trick
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