What is resistivity vs. resistance?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Resistance is the opposition to current flow in a specific object and depends on its dimensions (length and cross-sectional area). It's measured in ohms (Ω).
Resistivity is an intrinsic material property independent of size or shape. It's measured in ohm-meters (Ω·m).
Think of it this way: resistivity tells you about the material itself, while resistance tells you about a particular piece of that material. A long, thin copper wire has higher resistance than a short, thick one, but both have the same resistivity because they're made of the same material.
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