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50.6 MB (50.0 MB compressed)
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35.6 x 35.6 cm ⏐ 14.0 x 14.0 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Potentiometer and sliding key. Potentiometers are a type of variable resistor. This is a linear potentiometer. Moving the sliding key (jockey, placed in clip) from one end to the other varies the resistance across its contacts. Potentiometers are used in devices such as light dimmers and volume controls.
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