(Solved): A 1.70 m cylindrical rod of diameter 0.500 cm is connected to a power supply that maintains a const ...

A 1.70 m cylindrical rod of diameter 0.500 cm is connected to a power supply that maintains a constant potential difference of 17.0 V across its ends, while an ammeter measures the current through it. You observe that at room temperature

the ammeter reads 18.8 A , while at

it reads 17.4 A . You can ignore any thermal expansion of the rod. Part A Find the resistivity for the material of the rod at

. Express your answer in ohm-meters.