Electrical Resistance

Electrical Resistance is the measure of how difficult it is for a current to pass through a conductor.

This quantity often measured in ohms [math]\displaystyle{ \Omega(\frac{Volts}{Amps}) }[/math] is used to determine the amount of current that will pass through a circuit. Resistance itself is dependent on a variety of factors including material, shape, and temperature.

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The Main Idea

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A Mathematical Model

In a circuit the Electrical Resistance is often calculated as [math]\displaystyle{ R = \frac{|\Delta V|}{I} }[/math] Often written [math]\displaystyle{ I = \frac{|\Delta V|}{R} }[/math] where V is the voltage and I is the current and R is the resistance. In these equations voltage and resistance are independent variables and Current is the dependant variable.

A Computational Model

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External links

1. http://hyperphysics.phy-astr.gsu.edu/hbase/electric/resis.html

2. http://www.britannica.com/technology/resistance-electronics

3. http://www.cleanroom.byu.edu/Resistivities.phtml

4. http://www.nist.gov/data/PDFfiles/jpcrd155.pdf

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