. Practical electricity for beginners. cid hasbeen replaced by other chemicals in theform of a paste instead of a liquid (Fig. 7). 12. Operation and Uses of Dry a cell is in use, the chemicals init eat the zinc and both chemicals andzinc are gradually used up. After thesehave been consumed, the cell is of no moreuse and is usually thrown away. Some- ge^on of a^d^ times if it is extremely cold, heating a cell cell, showing the carbon stick, thewill cause it to liven up, and the life can be zinc container, the ^ trip extended slightly sometimes by removing other l
. Practical electricity for beginners. cid hasbeen replaced by other chemicals in theform of a paste instead of a liquid (Fig. 7). 12. Operation and Uses of Dry a cell is in use, the chemicals init eat the zinc and both chemicals andzinc are gradually used up. After thesehave been consumed, the cell is of no moreuse and is usually thrown away. Some- ge^on of a^d^ times if it is extremely cold, heating a cell cell, showing the carbon stick, thewill cause it to liven up, and the life can be zinc container, the ^ trip extended slightly sometimes by removing other less impor-the wax from the top of the cell and pour- *^* p**^-ing water into it. It must be remembered at all times that adry cell is capable of furnishing electric pressure only whilethe chemicals and zinc are in good condition, and that evenwhile these are in good condition, it must be used for shortperiods only. Dry cells are used quite extensively for ringing door bells,running clocks, operating spark coils, etc. Often it is found. 22 PRACTICAL ELECTRICITY FOR BEGINNERS that one cell is not capable of furnishing suflBcient pressure, inwhich cases two or more are connected in series. That is, thecarbon of one is connected to the zinc of the second and theline wires to the other two terminals. The pressure of twocells connected in this manner is double that of one, and thatafforded by three is three times that of a single cell. 13. Brief Description of Storage Battery.—Thestoragebattery depends upon chemicals for its action as does the drycell, but they are of such a nature that they do not become ex-hausted as in the case of the latter. Instead of being made of zinc, carbon and a chemicalpaste, the storage battery ismade of plates of lead immersedin a dilute or weak solutionof sulphuric acid. When elec-trical current is sent into thebattery, a chemical actiontakes place which causes anelectrical pressure to be , when the battery isconnected to an electric circui
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectelectri, bookyear1921
