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PhysicsElectricity
Resistivity of a Wire
R = ρL/A — see how length and thickness change resistance.
Controls
2 m
1 mm
Live result
Area
0.7854mm²
Resistance
0.0407Ω
R = ρL/A — electrons squeezing through the wireArea: 0.7854 mm²
Nichrome has high resistivity, which is why it is used in heating elements.