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 285
erved from the table that both the + and — signs move constantly in thedirection from Ai to A, indicating a shifting of the field in this direction, the process beingrepeated during each cycle. Ques. What provision is made to correct the errordue to friction? Ans. The meter is compensated by… … BUSHING DISCS OF BILLIARDCLOTH,SOAKED INJEWFLERSOIL. disc carried on thesame shaft with themotor and rotated ina magnetic field ofconstant value. Ques. How is thecounter torqueproduced? Ans. When the discis rotated in the mag-netic field, eddy cur-rents are induced inthe disc in a directionto…
Electrical engineering
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