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ELECTRICAL ACTION 7
positive and one negative conductor. Every electric generator (battery or dynamo) may be regarded as having one positive and one negative pole. (5) The positive wire of any circuit represents the positive pole of the distant generator throughout its entire length. The negative wire represents the negative pole of the generator at any point in its length. (6) Attaching a motor or lamp to these wires at any point is exactly the same as attaching them to the generator poles themselves, except for the fact that each wire offers a certain amount of resistance per foot of the length to the flow of current, as will be explained later.
When disconnected from the generator, or when the generator is not in operation, the wires are said to be "dead." The instant they are connected to the poles of a working generator they become "live wires," being charged with "voltage," which means electric pressure, exactly the same as pounds mean pressure in a water pipe or a steam boiler.
Steam confined in a boiler seeks to reach the open air because in so doing it loses its pressure. Positive and negative electricity in a circuit seek to join forces or at least to equalize any difference between them. It was formerly claimed that current seeks to flow from positive to negative. It is now claimed that current seeks to flow from negative to positive. With these scientific arguments we are not especially concerned. The two seek to join forces in order to loose pressure or tension. Our only concern at this point is to give you some understand ing of how electrical action may be converted into power. (7) All that anyone yet knows positively is that there is an affinity between the two, or of one for the other if you prefer that expression. (8) The positive desires to become negative, or vice versa, and that "desire" is what we term "polarity" or "voltage." It represents difference in electrical pressure between positive ( + ) and negative ( — ).
How Work Is Performed
(9) When steam is confined in a boiler under pres