RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA / SCIENCE PHOTO LIBRARY RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA / SCIENCE PHOTO LIBRARY
Electrical conductivity of graphite. Footage of an experiment demonstrating the excellent electrical conductivity of graphite. A piece of graphite (a form of carbon) is connected to electrodes at lower centre, forming part of an electric circuit. The light bulb (right) is unlit, as there is no power in the circuit. When the power is switched on (upper left), the bulb lights up. This demonstrates that graphite conducts electricity. This is because of its layered, planar structure, with electrons free to move in space between the planes. For footage of the same experiment, with a different form of carbon called diamond, see clip K004/5709.
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