ANY time 2 different metals come into contact you form what is called a junction. It is called a thermocouple and produces a (minute amount) electrical current. While I wouldn't expect it to be a factor in power or power supply, it could be a large fraction of low voltage circuits, like phono.
This effect, (thermoelectric effect) should drive those nuts who can hear which way a fuse is installed in a power supply.
Rhodium is used in such couples, for many of the properties listed above.
Don't believe me? Get out a steel coat hanger and a piece of #12 copper wire.
Twist the ends firmly together. Use a vice and pliers if you have to. Connect the free ends to a DVM (what? You don't have a DVM? Shame!) and stick a match under the junction. You should get a couple MV, at least.
This effect, (thermoelectric effect) should drive those nuts who can hear which way a fuse is installed in a power supply.
Rhodium is used in such couples, for many of the properties listed above.
Don't believe me? Get out a steel coat hanger and a piece of #12 copper wire.
Twist the ends firmly together. Use a vice and pliers if you have to. Connect the free ends to a DVM (what? You don't have a DVM? Shame!) and stick a match under the junction. You should get a couple MV, at least.