Have i discovered a boundless free energy source? would this work?

remember the potato clock. you stick 2 probes into a potato and magically the clock gets power. why not apply the same concept on a much larger scale!! if we can manufacture 2 gigantic rods say 700 times larger and wider than the sears tower and smash one deep into earths eastern hemisphere and the other into the western hemisphere we should get enough electrictity from that to power the entire world. is this theory possible?