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you do research than you build it.

if in grades, say 6th to 10th grade. a simple , but perfect experiment is the (what i call it ), is the open flash light experiment. on a small piece of wood , put two D size batteries together positive to negative, and positive to negative. they are in series's, meaning 1.5v + 1.5v =3v flashlight. on the negative end (flat end) connect a wire to it and let it go to a knife switch. from the other end of knife switch, connect a wire to the side of a flashlight bulb. you can glue or tape to it as long as it makes contact. from the positive side of the two batteries (raised end) connect a wire to the pointed bottom end of the bulb. you can call it Open View Of how a flashlight works. close knife switch, current flow through bulb and it lights, (closed loop). Open Switch, no current flows. bulb does not light(open loop). a very simple series circuit, but very effective in showing how electricity works.

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14y ago

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