The outlines of physics: an elementary text-book (1897)
Nichols, E. L. (Edward Leamington), 1854-1937 · New York, The Macmillan Company; London, Macmillan & Co., Ltd. · leaf 293
periment 74. — magnetic Influence of a Wire, carryingCurrent, upon a Floating Needle. Apparatus: (1) The floating needle previously described, a cell of battery,three or four meters of copper wire. Procedure: (a) Connect the wire to the terminals of the battery, and holdabout a half meter of the… … Fig. 242. a north and south plane. Note that the needle is deflected from itsnorth and south position in the earths field. The direction towards which the north-seeking pole tends is east erly or westerly, according to thedirection in which the current flowsthrough the wire. If the currentflows…
Physics
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