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• n  resistor for regulating current

• But whereas many comedians have a comic trigger, Carson had a comic rheostat; he modulated his tone precisely, running a low-key cocktail party where Hollywood and Main Street both .
• The specimens are placed on aluminum electrodes in a small, round box called a "dynamizer," connected by an elaborate wiring system with a "rheostat dynamizer" for amplifying .
• Gaetan Dugas reached up for the lights, turning up the rheostat slowly so his partner's eyes would have time to adjust.

• variable resistor

News & Articles

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• Research and Markets: Global Electrical Resistor, Rheostat and Potentiometer Market to 2017 - Market Size, Growth and ...
  Research and Markets has announced the addition of the "Global Electrical Resistor, Rheostat and Potentiometer
  Oct. 22, 2013 - Business Wire via Yahoo! Finance

Quotes

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• David Petraeus in Strategy Page
  We've been at moments of strategic change,Petraeus replied. "These are not light-switch moments ...... what you have is more of a rheostat -- many, many rheostat moments -- where in small areas, local areas, districts and eventually...
• Gen James L Jones in Los Angeles Times
  ...month, national security advisor James L. Jones Jr., a retired four-star Marine general, said changing Pentagon policy on gays in the military would require not the flick of a light switch but "more of a rheostat."