Ohm's Law &acirc;€” WSU

# Ohm's Law &acirc;€” WSU - Ohm's Law WSU...

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Ohm's Law In the mid 1800's German physicist, Georg Simon Ohm noticed the following: There is a direct relationship between the amount of electromotive force applied to a circuit and the amount of current in the circuit. In other words, if the EMF in a circuit increases by 10%, the current in the circuit will also increase by 10%. There is also a direct inverse relationship between the amount of resistance in a circuit and the current in a circuit. In other words, if the resistance in a circuit increases by 10%, the current in the circuit will decrease by 10%. He formulated a mathematical equation to represent these relationships. The equation is known as Ohm's law. E = I x R. This equation can be manipulated with algebra to produce two other formulas: I = E/R R = E/I If you will recall from Chapter One, "E" represents Electro-motive force (EMF), "I" represents Current, and "R" represents resistance. In typical automotive diagnostics, most of Ohm's law calculations are not very
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