Question

Difference between resistance and resistivity

Answer 1

Resistance:

• The ratio of the potential difference between the two ends of a conductor to the current flowing through at uniform temperature is called resistance of that conductor.
• The unit of resistance is ohm (Ω).
• Resistance of conductor depends on its length, temperature, cross section area, material of the conductor.
• Resistance is related with a particular conductor.

 Resistivity:

• At a fixed temperature amount of resistance offered in the flow of current by a conductor having unit length and unit cross section is called its resistivity or specific resistance.
• The unit of resistivity is ohm-meter (Ω-m).
• resistivity of conductor depends on the material of the conductor and its temperature.
• Resistivity is related with the material of the conductor.

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hope it helps!!

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.