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Physics, 17.03.2020 02:12 princess239
A 1.70 m cylindrical rod of diameter 0.500 cm is connected to a power supply that maintains a constant potential difference of 14.0 V across its ends, while an ammeter measures the current through it. You observe that at room temperature (20.0 ∘C ) the ammeter reads 18.7 A , while at 92.0 ∘C it reads 17.2 A . You can ignore any thermal expansion of the rod.
part 1) Find the resistivity and for the material of the rod at 20 ∘C .
part 2) Find the temperature coefficient of resistivity at 20 ∘C for the material of the rod.
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