State 4 difference between resistance and resistivity ??

1
by yudhishthir

2014-08-02T23:38:28+05:30

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1  Resistance = R  = potential drop across R / current passing thru R
resistivity  is defined as  row  = R * A / L
R = resistance of conductor,  A  area of crosssection, L lenght of conductor

2 Resistance varies as size of conductor varies, diameter, length or area etc.
Resistivity is constant for a type of material like copper .

3  Resistance depends on resistivity ,    resistivity does not depend on R

4)  Resistivity is the inherent property of the material lieke copper, rubber, glass, steel
Resistance is property of the conductor piece along with its shape

Similarity
both depend on temperature. Both increase with temperature.