Ohms law
In the case of an electrical resistance, the relation between the macroscopic voltage u(t) and current i(t) is Ohms law, given by:
,
where R is the resistance in
(Ohms).
Complément : Additional resources
In reality, the current that passes through the resistance increases its temperature by the Joule effect. This in turn then modifies the value of the resistance. The resistance is therefore time dependant, and should be written R(t).
The power dissipated by the resistance is written
