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What
makes a doorbell work? Push the button on the doorbell
on the pinball flipper. Look inside the clearboxes and
try to find the coil of wire and iron rod that make
them work. Press the start current button on the left
side of the table. Now grab the the iron rod and try
moving it in and out of the copper core. Coils of wire
called solenoids, are used with iron plungers to turn
electricity into short quick motion, such as in doorbells
or pinball flippers. They also activiate the starter
in your car, and close valves in washing machines.
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