Electricity turned out to be such a wonderful thing that humanity simply cannot do without it. But a little more than a hundred years have passed since the moment the first electric bulb was lit under the ceiling. Of course, good lighting of the room was far from the main task of using this latest type of energy. Indeed, at all times, the best minds of mankind have been looking for an opportunity to find a source of energy that would relieve the use of the unproductive labor of human strength.
