GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Conductivity test. A battery and a light bulb are used to test electric conductivity of different materials. As shown here, a graphite core from a common pencil ( lead ) conducts electrical current hence graphite is classified as a conductor. Graphite is a rare example of a non-metal that conducts electricity. Photo 10 of 10.
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