Resistance: When Power DOES NOT Flow

Though it was Stephen Gray who in 1729 first noted that some metals and materials are more conductive, or willing to let electricity pass through them, than others, it was Georg Simon Ohm who first managed to come up with an equation for this phenomenon. It is known as Ohm's Law, or the law of resistance.

Ohm's Law states that in a circumstance of constant temperature in an electrical circuit, the current that is passing through a conductor is proportional to the voltage of the system, and inversely proportional to the resistance of the system. in other words, if the voltage is higher, the current is higher, but if the resistance is higher, the current is smaller. the equation for Ohm's law is

I=(V/R)

where I is the current and V and R are the voltage and resistance, respectively.

Ohm first presented the concept to the scientific community in his 1827 book Die galvanische Kette, mathematisch bearbeitet (German: The Galvanic Circuit Investigated Mathematically). Though coldly received at the time, the book has greatly influenced the development of electrical technology and our understanding of the phenomena.