Question
Wires 1 and 2 are made of the same metal. Wire 2 has twice the length and twice the diameter of wire $1 .$ What are the ratios (a) $\rho_{2} / \rho_{1}$ of the resistivities and (b) $R_{2} / R_{1}$ of the resistances of the two wires?
Step 1
Since wires 1 and 2 are made of the same material, their resistivities are the same. Therefore, the ratio of their resistivities $\rho_{2} / \rho_{1}$ is equal to 1. Show more…
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ELECTRIC CURRENTS
Resistivity
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