Wiring and componentsQuestion 63 of 1506

Which contact material resists corrosion best, but is limited in current capacity?

  1. Silver
  2. Gold
  3. Silver-cadmium alloy
  4. Copper
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Correct answer: Gold

Gold may also cold weld under high mechanical force.

Source: Lessons in Electric Circuits IV: Digital (Kuphaldt), 4.2: Switch Contact Design

Practice wiring and components

Questions last reviewed: 18 October 2026