A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 919
should have aresistance of 0-1 ohm for a current of 10 amperes, 0-01 ohm for acurrent of 100 amperes, and so on, so that the p.d. between itsterminals is of the order of 1 volt. The arrangement is shown in 894 MAGNETISM AND ELECTRICITY CHAP. 11 Fig. 833. With the key K on one side, the length of… … between the terminals of R is IR, we have IRE or, 1- E ~r Fig. 833.—Current by potentiometer. In this way the current I isifound in terms of the two!standards E and R. For roughmeasurements E may be aDaniells cell whose e.m.f. is taken as 1-1 volt, but for more exactmeasurements the cadmium cell…
Physics
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