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 201
ttery and galvanometer arranged as in fig. 694, (^20 HAWKIXS ELECTRICITY Oues. What precaution should be taken with thebrush holders .- Ans. Since, they are liable to be short circuited through therocker by metallic dust lodging in the insulating washers, they should be kept clean. Oues. How are… … Pig. 69&.—Field coil testing with telephone rectiver. In the method here shown, a telephonereceiver is connected in series with two s>iimietrically placed coils A and B. Ver>- littlesound will be heard when the flux through the two coils AB is the same; but if a short-circmted coil is…
Electrical engineering
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