Electrical Resistance: Difference between revisions
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In a circuit the Electrical Resistance is often calculated as <math>R = \frac{|\Delta V|}{I} </math> Often written <math>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. | In a circuit the Electrical Resistance is often calculated as <math>R = \frac{|\Delta V|}{I} </math> Often written <math>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. | ||
=== | ===Water Analogy=== | ||
Electrical Resistance in a particular material is often compared to a pipes of varying diameter. The larger the pipe the easier it is for water to get through. This is equivalent to lower resistance in electricity. | |||
==Examples== | ==Examples== | ||
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4. http://www.nist.gov/data/PDFfiles/jpcrd155.pdf | 4. http://www.nist.gov/data/PDFfiles/jpcrd155.pdf | ||
5. http://www.regentsprep.org/Regents/physics/phys03/bresist/default.htm | |||
Helpful Videos | Helpful Videos | ||
Revision as of 17:36, 1 December 2015
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. In most applications the resistance of a wire is assumed to be zero.
The Main Idea
State, in your own words, the main idea for this topic Electric Field of Capacitor
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.
Water Analogy
Electrical Resistance in a particular material is often compared to a pipes of varying diameter. The larger the pipe the easier it is for water to get through. This is equivalent to lower resistance in electricity.
Examples
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External links
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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
5. http://www.regentsprep.org/Regents/physics/phys03/bresist/default.htm
Helpful Videos
1. https://www.youtube.com/watch?v=-PJcj1TCf_g
2. https://www.youtube.com/watch?v=J4Vq-xHqUo8
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