Physics, 24.10.2019 17:43 kerriscaballero12
A1.20-m cylindrical rod of diameter 0.570 cm is connected to a power supply that maintains a constant potential difference of 15.0 v across its ends, while an ammeter measures the current through it. you observe that at room temperature (20.0°c) the ammeter reads 18.6 a, while at 92.0°c it reads 17.5 a. you can ignore any thermal expansion of the rod. (a) find the resistivity at 20°c for the material of the rod. (b) find the temperature coefficient of resistivity at 20°c for the material of the rod.
Answers: 1
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A1.20-m cylindrical rod of diameter 0.570 cm is connected to a power supply that maintains a constan...
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