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Tell me the difference between resistance and resistivity and conductance and conductivity

Tell me the difference between resistance and resistivity and conductance and conductivity
 
 

Grade:11

2 Answers

Saurabh Kumar
askIITians Faculty 2400 Points
7 years ago
Conductance is a property of the component but conductivity is a property of the material.
Conductance depends on the dimensions of the conductor, but conductivity does not depend on the dimensions.
Conductance is measured in Siemens while conductivity is measured in Siemens per meter.
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Resistance across a conductor is the ratio of the potential difference across it to the current flowing through it.
Resistivity of a material is the ratio of electric field strength to the current densityat a specific temperature.
Units
Resistanceis measured in units of ohms (Ω).
Resistivityis measured in units of ohm metres (Ω m).
Dependence
Resistance is a property of a particular object. It depends on the object’s material, temperature as well as its dimensions (directly proportional to length,inversely proportional to the cross-sectional area for the case of a uniform metal wire).
Resistivity is a property of a particularmaterial. It isnot dependent on the dimensions. It is, however, dependent on temperature.
Umakant biswal
5349 Points
7 years ago
@ sairam
Conductance can be defined as the degree to which an object conducts electricity, calculated as the ratio of the current which flows to the potential difference present their ,
This is the reciprocal of the resistance, and is measured in siemens or mhos.
Conductivity can be defined as the degree to which a specified material conducts electricity, calculated as the ratio of the current density in the material to the electric field which causes the flow of current..
the unit is  one millionth of a Siemen per centimeter (micro-Siemens per centimeter or µS/cm).
reSIATNCE is a property of a conducter to offer obstruction to the flow of electric current .
its unit is ohm ,
restivity can be defined as a measure of the resisting power of a specified material to the flow of an electric current.
The SI unit of electrical resistivity is the ohm⋅metre (Ω⋅m)
it is represented by greek letter Rho ..
HOPE IT CLEARS YOUR DOUBT

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