Ohm's Law

WIP -- Claimed by Max Trussell

Ohm's law is very famous equation discovered by Georg Ohm describing the proportional relationship between voltage and current through some conductor. Most commonly this equation is seen in the form of

, with I representing current in amperes, V representing electric potential in volts, and R the resistance in ohms.

The Main Idea

Stripped down to its most basic, Ohm's Law exists so that either the electric potential, current, or total resistance of some conductor may be found when two out of the three are known quantities. This is possible because of the simple, linear relationship between the three.

A simple Ohmic circuit displaying I, V, and R as relevant to Ohm's Law.

A Mathematical Model

While most often represented as [math]\displaystyle{ {I = \frac{|\Delta V|}{R}} }[/math], Ohm's Law may also be represented as [math]\displaystyle{ V = IR }[/math] or [math]\displaystyle{ {R = \frac{V}{I}} }[/math]. Noteworthy is the fact that Ohm's Law depends upon Ohmic resistance and near ideal conductors to be accurate. Fortunately, most simple circuits without capacitance or inductance are fit this criteria as the wires offer minuscule resistance when compared to the various resistors in the circuit. Also worth noting is that V does not necessarily represent the potential difference across a single source of electric potential (e.g. a battery) but rather the absolute value of the potential difference across an entire circuit.

A Computational Model

How do we visualize or predict using this topic. Consider embedding some vpython code here Teach hands-on with GlowScript

Examples

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