Teacher demonstrates static electricity

Teacher demonstrates static electricity

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Credit: JOHN HOWARD/SCIENCE PHOTO LIBRARY

Caption: A teacher demonstrates to his secondary school physics class how static electricity can be used to light up a neon light bulb. The silver dome is the top of a small Van de Graaff generator. An endless insulating belt runs from the base of the generator to a pulley within the dome. Electrical charge is sprayed onto the belt at the bottom and is collected by a row of needles within the dome. The charge on the dome builds up and can then be discharged through a bulb, making it light up.

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Keywords: class, experiment, generator, graaf, graf, graff, lesson, physics, pupil, school expt., science education, student, van de graaff

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