AP Physics C: E&M
11.3 Resistance, Resistivity, and Ohm’s Law
A cylindrical conducting wire of uniform cross section has length \(L_0\), resistance \(R_0\), and carries a current \(I_0\) when connected to an ideal battery of potential difference \(V_0\). The wire is uniformly drawn out such that its length increases to \(3L_0\) while its volume and resistivity remain constant. If the drawn-out wire is connected across the same potential difference \(V_0\), what is the new current in the wire?
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