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ELECT RICA L A CTION
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dry cell (battery) such as is used to ring bells has approximately 1.5 volts pressure. It imparts that pressure to the wires attached to its terminals. (7? | 1 £ a properly insulated wire is attached to each terminal ot" a dry battery cell, both wires will have a pressure of approximately one and one-half volts at any point of their length, excepting only the pressure used up in moving the current from its point of generation to the point where the voltage is measured. (76) If we connect the positive of one battery cell to the negative of another cell, or the positive of one dynamo to the negative of another dynamo, a series connection is formed as per Fig. 6, and a circuit connected to the other two poles of the combined cells or dynamos will have the full combined voltage charge of both cells or dynamos. If the cells each have 1.5 volt charge, the circuit will carry a 3-volt charge. If the
Figure 6
dynamos each have 110-volt charge, the circuit will carry a 220volt charge. The amperage, however, will equal only the amperage capacity of one of the cells or dynamos.
(77) If one wire of a circuit is cut and one end connected to the positives and the other to the negatives of two or more cells or dynamos as per Fig. 7, the circuit formed by the wires will have a voltage charge equal only to that of one of the cells or dynamos, but the full amperage capacity of all cells or dynamos thus connected will be available. This is a parallel or multiple connection, the two terms having exactly the same meaning. Series connection increases pressure. Parallel connection increases amperage. Any number of cells (or dynamos) of equal voltage and other characteristics may be connected either way. Each unit connected in series