Calculate the resistance of a piece of a 20- gauge copper wire 2 m long. The cross-sectional area of the wire is 0.5176mm2 answer: R= 6.65 x10-2 Ω.(prove it

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Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.