. The principles of physics. city of the same kind to theremote side of the conductor, and attracting the opposite kindto the side near to it. Such electrical action is called induc-tion. The electrified body which produces the action is calledthe inducing body ; the charge of electricity thus produced iscalled induced electricity. 403. Charging by induction. Experiment S. — Take a proof plane E (Fig. 339) (which consists of aninsulating handle of glass or gutta percha, terminating at one end with athin metal disk, F, about the size of a 5-cent nickel), and connect it withan electroscope, G, b
. The principles of physics. city of the same kind to theremote side of the conductor, and attracting the opposite kindto the side near to it. Such electrical action is called induc-tion. The electrified body which produces the action is calledthe inducing body ; the charge of electricity thus produced iscalled induced electricity. 403. Charging by induction. Experiment S. — Take a proof plane E (Fig. 339) (which consists of aninsulating handle of glass or gutta percha, terminating at one end with athin metal disk, F, about the size of a 5-cent nickel), and connect it withan electroscope, G, by a fine wire, H. Bring a stick of sealing-waxelectrified as before with — E near the egg-shell conductor. Holdingthe proof plane by the insulating handle, bring the disk near the end ofthe conductor charged by induction with —E. The —E will act induc-tively upon the continuous conductor consisting of disk, wire, andelectroscope, charging the end nearest itself ( the disk) with -)-E and CHAKGING BY INDUCTION. 443. Fig. 339. the remote end ( the leaves) with —E. The leaves of the electro-scope show the presence of a charge by their divergence. Now while everything is in the position indicated by the cut, touchwith the finger anypart of the continu-ous conductor; theleaves of the electro-scope instantly col-lapse. The —E withwhich the leaves hadbeen charged beingfree is dischargedthrough your the -|-E concen-trated on the disk ofthe proof plane is bound by the attraction of the charge of — E on the end of the shellnearest it, and cannot escape. Remove the finger from the electroscopeand the proof plane from the influence of the shell; the leaves again diverge. The last phenomenon is explained as follows i After — Ehad been discharged from the continuous conductor, therewas left an excess of + E; but this excess was all concen-trated in the disk P so long as it remained near the negativecharge of the shell. But as soon as F was removed from theinfl
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectphysics, bookyear1895
