3 ms·

Looks like tungsten has more than twice the electric resistivity of gold. Setting up a conductivity test shouldn't be too hard.

• daneel_w 4y ago
  Because of electrical current preferring the path of least resistance (the gold instead of the tungsten), and because of the Skin effect (https://en.wikipedia.org/wiki/Skin_effect https://en.wikipedia.org/wiki/Skin_effect), I suspect such a test would be inaccurate. Especially given how thick the plating is in these particular bars.
  • tyingq 4y ago
    A high current test might work, albeit with some undesirable side effects :)
  • upofadown 4y ago
    No skin effect for the direct current you could normally use to measure resistance. Accurately measuring the resistance of something as large as a metal bar can be tricky, but the gold would help as it does not oxidize on the surface.
  • marcosdumay 4y ago
    The skin effect happens exclusively on alternating currents, and you will need a fairly high frequency for it to become a problem on the size gold bars usually have. So, no, it's completely irrelevant here.