The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 110
uced ELECTR OMA GNE TISM. 93 current being always in such direction as to oppose themechanical movement by which it is produced, accord-ing to what is known as Lenzs law. Current Induced by Opening or Closing Primary Circuit.—If a primary coil be placed inside of a secondary andinsulated from it,… … Fig. 41. G, and the primary with the battery P ; the latterconnection being made, for convenience, through themercury cups ^ ^. No movement of the needle occurswhile the connections remain undisturbed, but if theprimary circuit be opened by lifting a wire terminalfrom one of the mercury cups a…
Electricity · Magnetism
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