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 109
ELECTRICAL AND MECHANICAL ENERGY 89 EXAMPLE.—An incandescent lamp taking one-half an ampere ofcurrent on a circuit having a pressure of 100 volts, or a lamp taking oneampere on a circuit having a pressure of 50 volts, would each be con-suming 50 watts of energy, and this multiplied by the number of… … Fig. 85. — Tyndalls experiment illustrating the production of heat by friction. A brass tubeabout 7 inches in length and % of an inch in diameter, is fixed on a small wheel. Bymeans of a cord passing round a much larger wheel, this tube can be rotated with anydesired velocity. The tube is three…
Electrical engineering
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