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do you know about Resistivity and Conductivity?

Started by agostina, January 14, 2013, 09:11:50 AM

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agostina



i want to calculate conductor resistance hence if you know Resistivity and Conductivity can you explain?

thanks

cabledatasheet

#1
Resistivity and Conductivity is about same

The electrical resistance of a wire would be expected to be greater for a longer wire, less for a wire of larger cross sectional area, and would be expected to depend upon the material out of which the wire is made. Experimentally, the dependence upon these properties is a straightforward one for a wide range of conditions, and the resistance of a wire can be expressed as

R=pL/A

R= Resistance
p= Resistivity
A=Cross-section Area

The factor in the resistance which takes into account the nature of the material is the resistivity . Although it is temperature dependent, it can be used at a given temperature to calculate the resistance of a wire of given geometry.

The inverse of resistivity is called conductivity. There are contexts where the use of conductivity is more convenient.

conductivityis 1/p(Resistivity)

Generally like this

and i put PDF file for more information link is below edit from wiki


Electrical resistivity and conductivity
Electrical impedance
Characteristic impedance

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