Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 90
pensive source of current supply hasbeen created, the dry cell has been brought to a high state of efficiency. An ammeter test should be made of each dry cell before purchasing.The ignition size cell should test at least 25 amperes; to avoid waste ofcurrent, make the ammeter test as quickly as… … Figs. 3,926 to 3,929.—Hydraulic analogy of equal capacitiesat different pressures. Theoretically, two batteries com-posed of the same number of cell differently arranged,contain equal amounts of electrical energy, but at differentvoltages; just as two tanks may contain equal amounts ofwater at…
Electrical engineering
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