A 1.30{\ m m} cylindrical rod of diameter 0.550{\ m cm} is connected to a power
ID: 2154198 • Letter: A
Question
A 1.30{ m m} cylindrical rod of diameter 0.550{ m cm} is connected to a power supply that maintains a constant potential difference of 14.0{ m V} across its ends, while an ammeter measures the current through it.A 1.30{ m m} cylindrical rod of diameter 0.550{ m cm} is connected to a power supply that maintains a constant potential difference of 14.0{ m V} across its ends, while an ammeter measures the current through it. You observe that at room temperature (20.0 ^circ { m C}) the ammeter reads 18.8{ m A} , while at 92.0 ^circ { m C} it reads 17.3{ m A} . You can ignore any thermal expansion of the rod.Part A
Find the resistivity and for the material of the rod at 20 ^circ { m C}.
Explanation / Answer
Resistivity of Carbon@ 20°C 3500 * 10^(-8} ?
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