Four wires of equal length and cross-section are made from the materials listed below

PHYSICS · Single correct · CBSE · Physics · Electricity · Electricity

Problem

Four wires of equal length and cross-section are made from the materials listed below. Which material will allow the greatest electric current to pass when the same potential difference is applied across each wire? Material P: 1.7×10−8 Ω m1.7\times 10^{-8}\,\Omega\,\text{m} Material Q: 2.7×10−8 Ω m2.7\times 10^{-8}\,\Omega\,\text{m} Material R: 1.1×10−6 Ω m1.1\times 10^{-6}\,\Omega\,\text{m} Material S: 4.9×10−7 Ω m4.9\times 10^{-7}\,\Omega\,\text{m} (a) Material R (b) Material Q (c) Material P (d) Material S

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