Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 402
ential along A B. The contact points M and M arethen adjusted until the galvanometer shows that no current isflowing, when the value of the unknown electromotive force can beread from the position of the points M and M. In the diagram,the connections show the unknown electromotive force… … QPi< a -0!HCO O < « <:o H <: -^^ 1 - 3M a 3l i^ PS ofa >■ 1-1 o H ow ►J OP CO Ct)H ELECTRICAL MEASUREMENTS 67 resistance; when 7?2 is closed, the circuit is closed through a lowerresistance; and when key R^ is closed, the circuit is closed throughzero resistance. The purpose of keys…
Electrical engineering
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