State three difference between resistance and resistivity
Answers
1.Resistance of a conductor is the obstruction offered by the conductor due to the flow of current through it.
2.Resistance depends on the material the conductor is made up of, Temperature of the conductor, length of the conductor,and Area of the cross-section of the conductor.
3.Unit is- ohm.
Resistivity:-
1. Resistivity of the conductor is due to which it offers resistance to the flow of current through it.
2. Resistivity of the material depends upon the material the conductor is made up of, And the Temperature of the Conductor.
3. Unit of the Resistivity is- Ohm/meter.
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.