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 33
INS ELECTRICITY Oues. What advantage has the sine galvanometer overthe tangent instrument? Ans. Its advantage is in the case where the relative valuesof two or more currents arc required to be measured, or wherethe constant of the instrument is obtained by comparison witha standard measuring… … Pig. 525.—Differential galvanometer. It consists of two coils of wire, so wound .is to haveopposite magnetic effects on a magnetic needle suspended centrally between them. Theneedle of a differential galvanometer shows no deflection when two equal currents aresent through the coils in opposite…
Electrical engineering
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