id author title date pages extension mime words sentences flesch summary cache txt 34061 Chipman, Robert A. The Earliest Electromagnetic Instruments .txt text/plain 9628 567 57 before Oersted discovered the magnetic effects of a voltaic circuit. The heating of the wires in electric circuits must have been observed so magnetic effects of a voltaic circuit, on July 21, 1820.[9] portion of a voltaic circuit created an electrical instrument, the needle was deflected clockwise when the wire of a particular voltaic force of the needle on the connecting wire in the simple Oersted reaction-force of a magnetic needle on the connecting wire of a voltaic configuration of needle and wire is in fact present here, Schweigger a single wire, using the weak electric circuit here, deflects the analysis of Oersted's observation, Poggendorf ran the connecting wire of Poggendorf experimented with the size of the circuit wires, finding that Magnetism as a Measure of Electricity." (Neither Poggendorf nor any of Observing needle deflections for various positions of the wire A-B, with [Illustration: Figure 7.--"SCHWEIGGER MULTIPLIER" used by Oersted in ./cache/34061.txt ./txt/34061.txt