Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 66
Distance X Fig. 50.—Pull of a solenoid. When the plunger is longer than the solenoid, as is generallythe case in practice, the reluctance does not become a mini-mum until the plunger projects equally from both ends asshown in diagram B, Fig. 50, so that the range of the solenoidis increased, as may…
Electrical engineering
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