In additives to told, let's remember that the lightning beats sometimes from clouds (from above), and sometimes from the earth up, sometimes between thunderclouds. It again indirectly confirms that transfer of alternating current in the conductor is possible.
Now we of course know that electric current is the movement of electrons (in this case in metal which move when there is a potential difference. How it is possible to explain the movement of electrons in one wire?
If to lift any detailed course of physics, we will see that everything is described there. Except that such process can be made constant and there is also no mention of its applicability. It is quite strange as such task nonpluses many of us.
Continuing this subject we will tell that it is possible to claim that by a well-known method of electrostatic induction (influence through a floor it is possible to achieve the same continuous process, that is excitement of alternating electric current on one conductor. If from one edge to affect with a charged body a nearby ball or the sphere for example a polished ebonite stick in a variable way and without concerning it – that approaching a stick to the sphere ball, deleting.