A natural philosophy : embracing the most recent discoveries in the various branches of physics, and exhibiting the application of scientific principles in everyday life .. (1899)
Quackenbos, G. P. (George Payn), 1826-1881 · New York, Cincinnati [etc.], American book company · leaf 361
apparatus. 909. What is the effect of a wire over which a current is passing on a harof soft iron placed across it? On a bar of steel so placed? 910. How is the effectgreatly increased ? What is such a coil of wire called ? How may a helix be made ?How is the effect of the helix increased ? With… … as to be lifted up and held suspended in the air in the mid-dle of the helix. A bar of soft iron placed in the same po-sition is endowed with strong magnetic properties for thetime, but instantly loses them when re-moved, or when the current ceases topass. To be magnetized, the bar mustalways be…
Physics
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