ISBN: 9781231249369

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 54 pages. Dimensions: 9.7in. x 7.4in. x 0.1in.This historic book may have numerous typos and missing text. Purc… Meer...

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 54 pages. Dimensions: 9.7in. x 7.4in. x 0.1in.This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 edition. Excerpt: . . . received its name, hangs from the edge of the glass jar; the copper C is connected to the external circuit hy the wire W. which is covered with an insulating material on those parts submerged in the liquid. When the cell is set up, the copper plate is surrounded with crystals of cupric sulfate until it is completely covered. The zinc weighs about 3 pounds, and 2 pounds of cupric-sulfate crystals are required to charge the cell. The E. M. F. is about 1. 07 volts. The maintenance of this cell is simple. 27. Bunsen Cells. --Bunsen cells have also been used for operating coils, but they are rather objectionable on account of their odor. Voltaic cells are at present rarely used for heavy work, but rather more for charging accumulator, or storage-batteries. They can then do their work more slowly, without being strained to their utmost capacity, and at a higher efficiency. ACCUMULATORS, OR STORAGE-BATTERIES. CLASSES. 28. Difference Between Primary Cells and Accumulators. --There is this difference between a primary and a storage, also called a secondary, battery, that while the first is able to furnish an electric current primarily as a result of chemical action taking place in the battery, the storage-battery, on the other hand, must first have a chemical action produced in it by means of an outside electric current. After this action has been completed, the source of electrical supply is disconnected. The battery is now seeking to return to its original chemical condition, and will, in doing so, return the greater part of the current that was sent into it and caused said chemical decomposition. We see, then, that it is not electrical but chemical energy that is stored in the battery, and that it is this energy that is changed into electrical. . . This item ships from La Vergne,TN., RareBooksClub<