Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 434
branches, which go, by A andB respectively, the one to the line, the other througha certain resistance P to the earth. If the ratiobetween the resistances in the arms RA and RB isequal to the ratio of the resistances of the line and ofP, then, by the principle of Wheatstones Bridge, nocurrent will… … Fjj^. 165. through M and producing a signal. If, while this isgoing on, the operator at the distant R depresses hiskey and sends an equal current in the opposite direction,the flow through the line will cease; but M will nowshow a signal, because, although no current flowsthrough the line, the…
Electricity · Magnetism
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