Resistors are often made from wire-wound coils or pieces of carbon. Rheostats and potentiometers are variable resistors. Prior knowledge and Internet research indicates that a Georg Simon Ohm was one of the forefathers of research into electrical resistance. “Ohm, Georg Simon Ohm, Georg Simon, 1789-1854...
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German physicist best known for Ohm's Law, the basic law of current flow. Educated in science by his father, a master locksmith, he worked as a schoolteacher before deciding to devote himself to research in physics. He began the studies leading to the formulation of his law in 1825 and discovered that the force of a current traveling through a conductor is a measure of the current...
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