Electric Resistance
Electric resistance R is a measure of how much an object or substance opposes the flow of electric current through it. In order to overcome the resistance and get the current to flow a higher voltage will be required. Resistance is measured in Ohms, represented by \(R\) and has a symbols \(\Omega\). The resistance of an object depends on its size, shape, material, and temperature.
The resistance of a material can be calculated using Ohm's Law, which states that the current flowing through a conductor is directly proportional to the voltage across it, and inversely proportional to its resistance.
Electric resistance formula |
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\( R = V \;/\; I \) (Electric Resistance) \( V = R \; I \) \( I = V \;/\; R \) |
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Symbol | English | Metric |
\( R \) = electric resistance | \(\Omega\) | \(kg-m^2\;/\;s^3-A^2\) |
\( V \) = electric voltage | \(V\) | \(kg-m^2\;/\;s^3-A\) |
\( I \) = electric current | \(I\) | \(C\;/\;s\) |
Electric resistance formula |
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\( R = V^2 \;/\; P \) (Electric Resistance) \( V = \sqrt{ R \; P } \) \(\ P = V^2 \;/\; R \) |
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Symbol | English | Metric |
\( R \) = electric resistance | \(\Omega\) | \(kg-m^2\;/\;s^3-A^2\) |
\( V \) = electric voltage | \(V\) | \(kg-m^2\;/\;s^3-A\) |
\( P \) = electric power | \(P\) | \(kg-m^2\;/\;s^3\) |
Electric resistance formula |
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\( R = P \;/\; I^2 \) (Electric Resistance) \( P = I^2 \; R \) \( I = \sqrt{ P \;/\; R } \) |
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Symbol | English | Metric |
\( R \) = electric resistance | \(\Omega\) | \(kg-m^2\;/\;s^3-A^2\) |
\( P \) = electric power | \(P\) | \(kg-m^2\;/\;s^3\) |
\( I \) = electric current | \(I\) | \(C\;/\;s\) |
Tags: Electrical