Wimshurst machine (electrostatic generator).

Wimshurst machine (electrostatic generator).

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Credit: JAMES STEVENSON/SCIENCE PHOTO LIBRARY.

Caption: Front view of a Wimshurst machine, a mechanical device used to generate static electricity, photographed in operation. Electrostatic charges are induced on the perimeter of 2 parallel, circular plates (appearing like windmill blades) which rotate in opposite directions when turned by a handle at bottom. Charges are collected by a system of pointed combs & stored in the tubular sections: when sufficient charge has built-up, static discharge occurs across the small metallic spheres (top) in the form of a blue spark.

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Keywords: electrical, electricity, electrostatic generator, energy, industry, physics, static electricity, technology, wimshurst machine

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