A 95 wt% Pt–5 wt% Ni alloy is known to have an electrical resistivity of 2.35 × 10–7 Ω • m...

A 95 wt% Pt–5 wt% Ni alloy is known to have an electrical resistivity of 2.35 × 10–7 Ω • m at room temperature (25°C). Calculate the composition of a platinum–nickel alloy that gives a room temperature resistivity of 1.75 × 10–7 Ω • m. The room-temperature resistivity of pure platinum may be determined from the data in Table 12.1; assume that platinum and nickel form a solid solution.

Table 12.1 Room-Temperature Electrical Conductivities for Nine Common Metals and Alloys