The best that I can find so far are that the things that are screwed to aluminum heat sinks that stand off of the circuit board are called power resistors. Well, today that I discovered that they contain a copper core if you crush them with a hammer. But... I see a shiny silver coating that looks like it might be actually silver (Ag).



Are they power resistors?

Is the copper silver plated?

Thanks, my first post!

Cheers,
kbe