<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points . Introducing the constant of proportionality, the resistance, one arrives at the usual mathematical equation that describes this relationship: </P> <Dl> <Dd> I = V R, (\ displaystyle I = (\ frac (V) (R)),) </Dd> </Dl>

The ohm's law for conduction in metal is
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