It's time for the nitty-gritty. Let's define Ohm's Laws:
Ohm's law can be stated in words as the current in a resistive circuit is directly proportional to its applied voltage and inversely proportional to its resistance. In equation form, Ohm's law states
V = I*R
Ohm's law demonstrates that if the applied voltage across a circuit is increased or decreased, the current generated in the circuit increases and decreases, respectively. Furthermore, as the resistance in a circuit increases, the current generated in the circuit decreases. The following are algebraic variations of Ohm's law that demonstrate theses observations.
I = V / R
Using one of the three algebraic variations of Ohm's law, and any two known variables, one can solve for the other unknown quantity.
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Date Last Modified: 11/20/00