It is a cool discovery but there's probably a bit more to it
The reason she can hear radio is that there's probably a minor short/oxidizing part that's closing the loop and rectifying the current. Cooper or aluminium oxides would do exactly that for example https://en.wikipedia.org/wiki/Metal_rectifier
The reason she can hear radio is that there's probably a minor short/oxidizing part that's closing the loop and rectifying the current. Cooper or aluminium oxides would do exactly that for example https://en.wikipedia.org/wiki/Metal_rectifier