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 18
stance, issuitable for measuring the pressure. Hence, a short coil instru-ment with its scale directly graduated in ami^eres is an ammeter,and the long coil type with graduation in volts is a voltmeter. GA L VA NO METERS 437 Classes of Galvanometer.—^There are numerous kinds ofgalvanometer designed… … Pig. 510.—Astatic needles. Two magnetic needles of equal moment are mounted in oppositionon a light support. The whole system is suspended by a delicate fibre, and when placedin a uniform magnetic field such as that of the earth, there will be no tendency to assumeany fi.xed direction, the only…
Electrical engineering
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