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 267
nger only five lines of force pass through it: should it move to the position AB C D, thenumber of lines passing through it will then be !, assuming the field to remain unchanged. The operation of moving iron instruments of the plunger type may beexplained by saying that the current flowing in the… … - • - ■ Hot Wire Instruments. —Instruments of this classdepend for their operationon the expansion and con-traction of a fine wire car-rying either the current tobe measured or a definiteproportion of that current. The expansion or contrac-tion of the wire is causedby temperature changes,which in…
Electrical engineering
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
