Clipart tagged: ‘variable resistor’

"Nichols Rheostat. a, wooden frame; b, tinned iron strip; c, stationary, and c', movable binding-posts; d, copper strip for short-circuiting." -Whitney, 1911

Rheostat

"Nichols Rheostat. a, wooden frame; b, tinned iron strip; c, stationary, and c', movable binding-posts;…

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