||Metal strip -- Brass tacks -- 1.5
volt batteries -- Insulated wire & hammer
||When you press the key and make the
metal strip touch the brass tack attached to the end of the wire, and magnetize
the nail, it will pull the metal strip and make a clicking noise.
||Release the key, magnetism is lost
as no current passes and the metal strip is released.
Diagram of Experiment 8
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