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Which two elements are used in precious instruments?

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in Design of Electrical Machines by (687k points)
Which two elements are used in precious instruments?

(a) Copper, Silver

(b) Gold, Silver

(c) Copper, Aluminum

(d) Gold, Aluminum

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This question is from High Conductivity Materials topic in division Electrical Engineering Materials of Design of Electrical Machines

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The correct option is (b) Gold, Silver

The explanation: Silver is used only in precious instruments because of its high cost. Gold, on the other hand, is not only costly but also not suitable for many practical applications and can lose its properties easily.

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