Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 264
nch. Chap. III.] Ohms Law. 245 To show this we require two sets of resistance coils (A andB in Fig. 151) put breast to breast, in connection with mercurycups (C, D), into which the battery wires dip, and a galvano-meter of small resistance compared to the resistances in A andB. In this case there… … Fig. 151. First include the galvanometer in the branch BC, the de-flection is seen to be 30°. Next remove the galvanometerfrom the branch BC, and include it in AC; the reading thenbecomes 41°. Referring to the table of tangents, we see that tan 30°= •577, and tan 41° = -865, t 865 30 n , and ——=—…
Electricity
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