ohms+law

  In fact he had already convinced himself of the truth of what we call today ‘Ohm's law’, which is the relationship that the current through most materials is directly proportional to the potential difference applied across the material.  **Ohm first said that the current through a circuit is given by the voltage across it divided by its resistance. A triangle helps to show the three relationships: **  ** V = I x R I = V ÷ R R = V ÷ I V = voltage I = current R = resistance **