# Ohm's Law

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Revision as of 02:08, 30 April 2009 by TimVK4YEH (Talk | contribs) (added initial info, internal links)

Related wiki pages : Electronic Theory, Voltage, Current, Impedance, Resistors

## What is it?

Ohm's Law states that the current that passes between two points on a conductor is directly proportional to the potential difference (voltage) between the points and inversely proportional to the to the resistance of the conductor between the points.

so, <math>I = \frac{V}{R}</math>

where

- "I" is the current in amperes,
- "V" is the potential difference between the ends of the resistor in volts, and
- "R" is the resistance of the resistor, measured in ohms

Ohms Law can also be used in impedance (resistance to AC) calculations thus:

<math>I = \frac{V}{Z}</math>

where

- "I" is the current in amperes,
- "V" is the potential difference between the ends of the resistor in volts, and
- "Z" is the Impedance (AC resistance) of the resistor, measured in ohms

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