you better say what phenomenon make a electrical energy in a coil ?
be sure it's not ions as the some members said , the EM field make that and the ferrite is only for increase amplitude of detected EMF .
it's not for battery effect and corrosion of a buried metal , i found some especially ancient gold items (above 90% pure gold) that kept in a resistant and dry place (with no electrolyte) and they had very strong EM energy .
best regards
Alex
|