
 Georg Simon Ohm: The Discovery of Ohm's Law 
  Georg Ohm, German mathematician and physicist, began his important publications in 1825. 
  Ohm's law, named after its discoverer, states that the potential difference V between the ends of a conductor or resistor R and the current I flowing through R are proportional at a given temperature: 
  Ohm's law is never completely accurate, if R is assumed to be constant, for "real world" devices, because no real device is an ohmic device for every voltage and current  at some level, the device will open or short, for example, by burning up or arcing. 
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