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What is the difference between resistance and resistivity?
Definition 1:- The resistance of an object (i.e., a resistor) depends on its shape and the material of which it is composed. Resistivity ρ is an intrinsic property of a material and directly proportional to the total resistance R, an extrinsic quantity that depends on the length and cross-sectional area of a resistor.

Definition 2:- Resistance is the opposition that a substance offers to the flow of electric current.  It is represented by the uppercase letter R.The electrical resistance per unit length, area, or volume of a substance is known as resistivity. Resistivity figures are often specified for copper and aluminum wire, in ohms per kilometer.

Definition 3:- Charge moves more readily through some materials than through others. The resistance of a sample is a measurement of how much the sample impedes the flow of electrons through it. The type of material within a resistor and its physical dimensions are some of the factors which determine its resistance. Resistivity is a different concept to resistance. Resistivity values are used to compare the conducting properties of different materials. The resistivity value of a specific material is a 'material constant' and, unlike resistance, is independent of the dimensions of the sample. 


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