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Resistance of a metal wire of length 1m is 26ohm at 20 degree Celsius. If the diameter of the wire is 0.3mm, what will be the resistivity of the metal at that temperature? Predict the material of the wire? |
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Answer» Answer: L = 1 m R = 26Ω d = 0.3 mm = 3/1000 m ∴ r = 0.3/2000 m Area of CROSS section = π = 3.14 x (0.3/2000)^2 formula, R = ρL/A ∴ρ = RA/L = 26 x 3.14 x0.3/2000 x 0.3/2000 =1.8369 x hope it will HELP you!!!!
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