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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Resistnace Is anything in a circuit that slows the flow down of electrons (the current) Planning Introduction Resistance is anything in the circuit that slows down the current (The flow of electrons...	1 / 243
Resistance coursework - some useful things So energy is needed to keep the electrons flowing. The longer piece of wire the more energy needed. When the length is doubled so does the resistance...	2 / 453
resistance of a wire This is because when the temperature increases the atoms of the metal vibrate more vigorously because of the increase in energy. This means that the electrons have more difficulty getting through the wire as they collide with the atoms, which are in their pathway...	15 / 4022
resitence of wire So The theory behind these conclusions are: As the length doubles the resistance doubles. Resistance is caused by electrons bumping into ions. If the length of the wire doubles, the electrons bump into the ions twice as much so the resistance will double...	2 / 302