Question

state 4 difference between resistance and resistivity ??

Answer 1

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.

Answer 2

Resistance is the term which is the resisting of flowing of charges from a specific substance of any size.

Consider we have a solid substance of copper. It will have a resisting of charges from flowing through the substance.

If we change its length and area provided to drift of charge, its resistance will vary.

But the one thing that will constant for all copper substance of any shape and size is resistivity. The resistance of a substance of copper , iron , germanium will vary if we change the shape and size of that substance, but its resistivity is constant at any shape and size.

Resistivity is different in copper,Iron etc because of their nature,but if we change the shape,only resistance will change.

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Resistivity is like the density of a material that is constant and resistance is like the mass which will depend on the length area or (volume) of substance.