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Question

What is the difference between resistance and resistivity?


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Solution

Definition

  1. The opposition that material provides to the passage of electric electricity is called resistance.
  2. Resistivity is a physical characteristic of a specific material with certain dimensions.

Difference between resistance and resistivity

ParameterResistanceResistivity
DefinitionThe property of a material that obstructs the flow of current.Material resistance with particular dimensions.
SymbolRρ
SI UnitOhmsOhms-meter
Formula

R=VI or,

R=ρLA

Here,

V is the voltage, I is the current, and ρ is the resistivity.

ρ=R×AL

Here,

R is the resistance, L is the length, and A is the cross-sectional area

DependenceTemperature, Length, and Cross-sectional areaTemperature

Therefore, the movement of free electrons would be a significant distinction between resistance and resistivity.


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