Resistance  Resistivity 
The electrical resistance of an object is a measure of its opposition to the flow of electric current. 
Resistivity
is the characteristic
property of the material by
which it
resists the amount of curren
t through it.

It depends upon
the
length , area of crosssection and nature of the material of the given material, and physical conditions like temperature 
It only
depends upon
the
nature of the material and physical conditions like temperature. 
Its SI unit is ohm (Ω)  Its SI unit is ohm meter. (Ωm) 
It is denoted by R .  It is denoted by ρ (rho) 
Formula
for Resistance is
R = V/I, or R = ρ(L/A) where V = Voltage, I = Current, ρ = Resistivity 
Formula
for Resistivity is
ρ = (R×A)/L where R = Resistance, L= Length, A = Crosssectional area 
Resistance depends on dimensions of the material, like length, area of crosssection 
Resistivity is independent of the dimensions of material

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