An elementary book on electricity and magnetism and their applications . j the solution ; never add the solution to theacid, as serious burns are apt to result. zinc When manganese dioxide is used asa depolarizer, it is generally brokenup into small lumps and put into aporous cup surrounding a positiveplate of carbon. When sal ammoniacdissolved in water is used as the liquidin this form of cell, it makes the famil-iar Leclanche cell (Fig. 8), which isfrequently used for ringing door bellsand doing similar service. Some-times the manganese dioxide is pul-verized and placed inside of the carbonp
An elementary book on electricity and magnetism and their applications . j the solution ; never add the solution to theacid, as serious burns are apt to result. zinc When manganese dioxide is used asa depolarizer, it is generally brokenup into small lumps and put into aporous cup surrounding a positiveplate of carbon. When sal ammoniacdissolved in water is used as the liquidin this form of cell, it makes the famil-iar Leclanche cell (Fig. 8), which isfrequently used for ringing door bellsand doing similar service. Some-times the manganese dioxide is pul-verized and placed inside of the carbonpositive plate and the porous cup isomitted (Fig. 9). In this case the zinc is bent into a cylinderaround the carbon electrode. The depolarizing effect of the man-ganese dioxide is not, however, sufficiently powerful to preventa cell from becoming polarized if used continuously. Conse-quently, Leclanche cells are satisfactory only in service whichis intermittent, such as ringing door bells, where the circuitis open a large part of the time and the battery rests without. Sal AmmoniacAcid Fig. 8. - Leclanche cell withporous cup. BATTERIES FOR PRODUCING ELECTRIC CURRENTS 19
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmagnetism, bookyear19
