his simple method is that the electro-motive forces are subject to variation from a variety of causeswhen the battery is in action, and the comparison shouldalways be made when no current is passing. 189. 2nd Method. By Cflarhs Potentiometer. For thismethod we require a battery of very constant… … Connect the battery A and a variable resistance in thecircuit ABC, and make a branch circuit BO^E^G containiDga galvanometer G^ and the cell E^ (which is supposed tohave greater electromotive force than E^, so placed that itscurrent in BG is opposite in direction to that of A. Varythe resistance…
Electricity
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