Define restivity it's mathmetical expression and SI unit
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Resistivity is the measure of a material’s ability to oppose the flow of current . 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.
Following is the equation relating resistivity (ρ) and resistance (R) of a conductor of length (L) and area (A).
ρ = AR / LL
Difference:
The SI unit of the resistance is ohm, and the SI unit of resistivity is ohm-meter. The resistance of the material depends on the length, cross-section and area of conductor whereas the resistivity depends on the nature and temperature of the material
Unit of resistivity is Ohm meter, Ω m .
Resistivity of the material of the conductor changes with temperature.
Following is the equation relating resistivity (ρ) and resistance (R) of a conductor of length (L) and area (A).
ρ = AR / LL
Difference:
The SI unit of the resistance is ohm, and the SI unit of resistivity is ohm-meter. The resistance of the material depends on the length, cross-section and area of conductor whereas the resistivity depends on the nature and temperature of the material
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OHM
p =AR/LL
IS THE MATHEMATICAL EXPRESSION
p =AR/LL
IS THE MATHEMATICAL EXPRESSION
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