Allen, Charles Ricketson, 1862- [from old catalog] · New York, H. Holt and company · leaf 65
that the distance from themagnet to the compass may be kept the same. Of course, for eachtest, both magnet and compass must be on the marks. X In comparing the effects of different numbers of turns, the sameCurrent should be used. 52 CURRENT ELECTRICITY. Questions.—1. What must be done in order to… … where the electro-magnet, A, is placed in the circuit, intowhich is also introduced the reverser, R. The ends of thecoil of a second electro-magnet, B, are connected byflexible wires with the sensitive galvanometer, G. When the current passes around A it becomes a magnet,and, if B is placed upon…
Physics
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