What is the resistance of a 3.9 m  length of copper wire 1.3  mm  in diameter? The resistivity of copper is 1.68×10−8 Ω⋅m .

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Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.