An international system of electro-therapeutics : for students, general practitioners, and specialists . electric current which the con-ductors possess. Electro-motive Force.—The cause which produces the electric currentwe have called electro-motive force. In order to give a clear idea uponthis point force, we will adduce several experiments:— If a battery cell be taken and the current which it produces causedto act upon a galvanometer, we shall then see that the needle is deflected;for instance, toward the right. If we change the communications of thebattery with the galvanometer the directio
An international system of electro-therapeutics : for students, general practitioners, and specialists . electric current which the con-ductors possess. Electro-motive Force.—The cause which produces the electric currentwe have called electro-motive force. In order to give a clear idea uponthis point force, we will adduce several experiments:— If a battery cell be taken and the current which it produces causedto act upon a galvanometer, we shall then see that the needle is deflected;for instance, toward the right. If we change the communications of thebattery with the galvanometer the direction of the needles deflection willbe altered, which shows that the direction of the current in the galva-nometer has been changed,—if we now consider the first conditions : theneedle deflected toward the right. If now a second battery cell, diflering in no way from the first, betaken and inserted in the circuit, and the negative pole of this secondattached to the positive pole of the first, the two currents will flow in thesame direction and join each other; we find that the intensity of the re-. FiG. 40. A-248 BLEYER. suiting current is increased, and consequently the deflection of the needleis greater. In these conditions the two battery cells are joined in inten-sity, forming (Fig. 40) a battery of two cells. A battery of any numberof cells could thus be formed, as stated before, but this is not the pointupon which we wish to insist; we desire only to call the expression batterycells joined in intensity^ and to determine the exact meaning. Suppose that we now insert a second cell in the circuit of the first,but uniting the positive pole to the positive pole and the negative to thenegative in such a manner as to have two poles of the same name endingat the galvanometer (Fig. 41). Under these conditions the needle will remain stationary. This isnot to be wondered at if it be remembered that the two cells tend to
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectuterus, bookyear1894
