16.3 Ohm's Law

16.3 Ohm's Law

In 1826, George Simon Ohm investigated the relationship between electric potential difference across a conductor and the current flowing through it.

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According to Ohm's law, the current flowing through a conductor is directly proportional to the potential difference V across its two ends, provided the physical state of the conductor remains the same.

V = I R
R = V / I

where R is the resistance of the conductor.