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- · New York, T. Audel · leaf 48
tion of shellac is applied to the upper edge, after whichthe stopper is pressed firmly in place. TESTING AND TESTING APPARATUS 467 Oues. What error is introduced in measuring thepressure of a battery with an ordinary voltmeter? Ans. Since the measurement is made on closed circuit thereading does…
Electrical engineering
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