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 905
x. Comparison of electro-motive forces.- The sim-plest method of comparingthe e.m.f.s of two cells isto find the current which each would produce in a given circuit.On placing one of the cells, of e.m.f. Ex, in series with a resistancebox R and a galvanometer G (Fig. 817) the current is EX/(G + R),… … Fig. 816.—Resistance box I lxix COMPARISON OF ELECTROMOTIVE FORCES 881 i currents, E1/E2 = dlld2, or if a tangent galvanometer be employed, I E1/E2 = tan djtsna. d*. Or, again, if a simple galvanometer, which I has previously been calibrated, is used, the I currents may be taken from the…
Physics
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