diffrence between Resistance and Resistivity
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Resitance is:-
The electrical resistance of an object is a measure of its opposition to the flow of electric current. The inverse quantity is electrical conductance, and is the ease with which an electric current passes. Electrical resistance shares some conceptual parallels with the notion of mechanical friction. The SI unit of electrical resistance is the ohm (Ω), while electrical conductance is measured in siemens (S).
The resistance of an object depends in large part on the material it is made of—objects made of electrical insulators like rubber tend to have very high resistance and low conductivity, while objects made of electrical conductors like metals tend to have very low resistance and high conductivity. This material dependence is quantified by resistivity or conductivity. However, resistance and conductance are extensive rather than bulk properties, meaning that they also depend on the size and shape of an object. For example, a wire's resistance is higher if it is long and thin, and lower if it is short and thick. All objects show some resistance, except for superconductors, which have a resistance of zero.
While Resistivity is:-
The resistivity of a material is the resistance of a wire of that material of unit length and unit cross-sectional area. The unit for resistivity is the ohm-metre. The resistivity of a material depends on its nature and the temperature of the conductor, but not on its shape and size. A good conductor has less resistivity, whereas a bad conductor or insulator has high resistivity. The resistivity of semi-conductors lies between that of conductors and insulators. The resistivity of a metallic conductor increases with an increase in its temperature, whereas the resistivity of a semi-conductor decreases with an increase in its temperature. The resistance of some materials decreases tremendously with a decrease in temperature in the very low temperature range of the order of absolute zero. Such substances are called superconductors. Conductivity is the reciprocal of resistivity, and determines the ability of a material to conduct electric current.
☺ａｎｓｗｅｒ:
⭕️Resistivity is also known as electrical resistivity.
⭕️Its a property that quantities how strongly a material opposes the flow of electric current.
⭕️A low resistivity indicates a material that allows the flow of electric current.
⭕️Its SI unit is ohm (symbol - Ω).
⭕️It's named after German physicist Georg Simon Ohm.
⭕️Resistivity of a conductor is a property of the material of the conductor.
⭕️ Unit of resistivity is Ohm meter, Ω m.
⭕️Resistivity of the material of the conductor changes with temperature.
⭕️Resistivity of copper is 1.7 × 10 -8 Ω m at room temperature.
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