What is the difference between 'resistance' and 'restivity'?

Asked by Ashrene | 1st Apr, 2012, 01:04: PM

Expert Answer:

1. Resistance is the obstruction offered to the flow of current by a conductor.
Resistivity is the obstruction offered to the flow of current by UNIT AREA OF the conductor.
 
2. resistance is the property of the object (say a copper wire), whereas resistivity is the property of the substance (copper).
 
3.  resistance depends upon the properties of the object.
Whereas resistivity depends upon the properties of the metal.
 
4. Resistance of a piece of material is proportional to its length and inversely proportional to its area. The proportionality constant p is called the resistivity, which is a property of the kind of material.
 
5.  resistance varies depending upon shape and size of the material while resistivity is constant for a particular material.

Answered by  | 1st Apr, 2012, 03:21: PM

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