"Permanent magnet" Quotes from Famous Books
 ... that the value of the apparatus would be greatly increased if it could be altered from an electro-magnetic to a magneto-electric machine, so as to produce a continuous current. Thus, if the electro-magnet, A B (Figs. 3 and 4), be replaced by a permanent magnet, and the annular armature were made to revolve, the apparatus would become a magneto-electric generator, which would produce a continuous induced current always in the same direction, and in analyzing the action of such a machine Dr. Pacinotti observes that, as the position ...
— Scientific American Supplement, No. 315, January 14, 1882 • Various
... attraction, electricity, static electricity, static, static cling; magnetism, magnetic attraction; gravity, attraction of gravitation. [objects which attract by physical force] lodestone, loadstone, lodestar, loadstar[obs3]; magnet, permanent magnet, siderite, magnetite; electromagnet; magnetic coil, voice coil; magnetic dipole; motor coil, rotor, stator. electrical charge; positive charge, negative charge. magnetic pole; north pole, south pole; magnetic monopole. V. attract, draw; draw ...
— Roget's Thesaurus
... being repelled. Bodies of the latter class were termed by Faraday diamagnetics. The strongest diamagnetic substance known is bismuth, its susceptibility being—0.000014, and its permeability 0.9998. The diamagnetic quality of this metal can be detected by means of a good permanent magnet, and its repulsion by a magnetic pole had been more than once recognized before the date of Faraday's experiments. The metals gold, silver, copper, lead, zinc, antimony and mercury are all diamagnetic; tin, aluminium and platinum are attracted by a very ...
— Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3 - "Destructors" to "Diameter" • Various
... through, for if passed wholly through, the needle is stopped as by a blow, and then he shows how this blow results from a reversal of the electric wave in the helix. He next operated with the powerful permanent magnet of the Royal Society, and obtained with it, in an exalted degree, all the ...
— Little Masterpieces of Science: - Invention and Discovery • Various
... to take advantage of this knowledge, knowing that the earth is a great permanent magnet, it was necessary to make a small magnet, and so suspend it that it would turn freely, and the magnetic north and south ...
— The Wonder Island Boys: The Mysteries of the Caverns • Roger Thompson Finlay |
