PhysRefPhysics reference
Category

Resistance of a wire depends on geometry and material.

Variables

R
Resistance
Electrical resistance
Ω
ρ
Resistivity
Material property
Ω·m
L
Length
Wire length
m
A
Cross-sectional area
Wire area
m²

Derivation

R = ρL/A from microscopic Ohm's law.

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