Answer to Question #307595 in Optics for Big Insect

Question #307595

The resistance of a wire of length 100cm diameter 0.3mm is found to be 3.0 ohms Calculate (1) the resistivity (2) the conductivity of the material of a wire

Expert's answer

"\\rho=\\frac{\\pi Rd^2}{4l}=2.12\\cdot 10^{-7}~Ohm\\cdot m,"

"\\sigma=\\frac 1\\rho=4.7~MSm."

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