Modern electricity and magnetism, theoretically and practically considered (1885)
Avery, Elroy M[cKendree], 1844- [from old catalog] · New York and Chicago, Sheldon and company · leaf 180
owsin such a direction as to reinforce the magnet at M\ thelatter attracts a^ more strongly than it did before. Whenthe current flows in the opposite direction, it weakens themagnetism of M\ which then attracts a! less. The disc,therefore, flies back. Thus, the vibrations of a! are likethose of a,… … INDUCED ELECTRICITY. 349 Exercises. 1. A dynamo is feeding 16 arc lamps, the average resistance ofeach of which is 4.56 ohms. The internal resistance of the dynamo(^.e., of the wire conductors of the armature and field magnets) is10.55 ohms. What current does the dynamo yield? Ans. 10.04 amperes.…
Electricity · Magnetism
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