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Please give me the proportionality relation between resistance and resisitivity.....are they inversely proportional to each other or directly proportional.why?

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R = ρ L / A

Resistance of a wire is proportional to the length of the conductor/resistor wire. Then the resistance of the wire is inversely proportional to the area of cross section.. Because the bigger the cross section, there is more area and more number of electrons available for flow of electricity. So resistance is less proportionately.

Thus R is proportional to L / A.

The constant of proportionality is found to be constant and specific property for any material. That is called the resistivity ρ of the material.

Resistance of a wire is proportional to the length of the conductor/resistor wire. Then the resistance of the wire is inversely proportional to the area of cross section.. Because the bigger the cross section, there is more area and more number of electrons available for flow of electricity. So resistance is less proportionately.

Thus R is proportional to L / A.

The constant of proportionality is found to be constant and specific property for any material. That is called the resistivity ρ of the material.