The electrical resistivity of copper (Cu) metal is po (T=20 °C) = 1.7 x 10* N•m at 20 °C. The temperature coefficient of electrical resistivity for Cu is, a = 390 x 10$ °C'. Calculate the temperature at which the magnitude of the electrical resistivity of Cu has increased by a factor of 2, when compared to its value at room temperature (20 °C). The temperature dependence of the resistivity is given by p(T) = po[1 + aAT]. A) Т - 154.8 °C В) т - 210 °С C) T= 276.4 °C D) T - 254.5 °C

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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.