Resistivity values at room temperature are: • • • • Which material is most suitable…

PHYSICS · Single correct · GCSE · Physics · Electricity · Electricity

Problem

Resistivity values at room temperature are: • ρNichrome=1.1×10−6 Ωm\rho_{\text{Nichrome}} = 1.1 \times 10^{-6}\,\Omega\text{m} • ρCopper=1.7×10−8 Ωm\rho_{\text{Copper}} = 1.7 \times 10^{-8}\,\Omega\text{m} • ρAluminium=2.8×10−8 Ωm\rho_{\text{Aluminium}}= 2.8 \times 10^{-8}\,\Omega\text{m} • ρSilver=1.6×10−8 Ωm\rho_{\text{Silver}} = 1.6 \times 10^{-8}\,\Omega\text{m} Which material is most suitable for making the heating element of an electric iron? (a) Copper (b) Silver (c) Nichrome (d) Tungsten

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