
Ohm's
law expresses the relationship between resistance, voltage and current.
The voltage being proportional to current, with the resistance as
proportionality coefficient , we can therefore write the ohm's law as
follows:
U = R x I
With U: voltage in volts
R: resistance in ohm
I: current in ampere
Comme toutes les relations on peut modifier son écriture de
manière à exprimer chacune des grandeur en
fonction des
autres: R = U : I ou I = U : R
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