Electricity
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Laws of electricity
Ohm's law
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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