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Ohm's Law defines the relationships between (P) power, (E) voltage, (I) current, and (R) resistance. One ohm is the resistance value through which one volt will maintain a current of one ampere.


    •( I ) Current is what flows in a wire or conductor like water flowing through a pipe. Current is measured in (A) amperes or amps.

    •( E ) Voltage is the difference in electrical potential between two points in a circuit. It's the push or pressure behind current flow through a circuit, and is measured in (V) volts.

    •( R ) Resistance determines how much current will flow through a component. Resistors are used to control voltage and current levels. A very high resistance allows a small amount of current to flow. A very low resistance allows a large amount of current to flow. Resistance is measured in ohms.

    •( P ) Power is the amount of current times the voltage level at a given point measured in wattage or watts.


The relationships of Current, Voltage, Resistance, and Power are given here:

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A great example provided by Jason See Profile can be found Here


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by Macy See Profile edited by Riss_Centaur See Profile
last modified: 2006-02-06 18:38:22