Ohm's Law

The German scientist George Ohm showed that there is a mathematical relationship between the intensity of the electric current passing through a circuit, the resistance offered and the voltage applied to it.
Ohm's law says that the difference of potential that exist in two points is the current flowing through one and out the other, multiplied by the resistance of these two points.

                                             A= I x R      I= V: A      R = V: I

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