The Standard Electrical Dictionary: A Popular Dictionary of Words, Terms and Phrases, Used in the Practice of Electrical Engineering. A Concise and Practical Book of Reference

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N.W. Henley & Company, 1897 - Electric engineering - 682 pages

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Page 611 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 109 units of resistance of the CGS system of electromagnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grammes in mass, of a constant cross-sectional area and of the length 106.3 centimetres.
Page 584 - Ampere, which is one-tenth of the unit of current of the CGS system of electromagnetic units and which is represented sufficiently well for practical use by the unvarying current which, when passed through a solution of nitrate of silver in water, in accordance with a certain specification, deposits silver at the rate of 0.001118 of a gramme per second.
Page 599 - As a unit of quantity, the international coulomb, which is the quantity of electricity transferred by a current of one international ampere in one second. As a unit of capacity, the international farad, which is the capacity of a condenser charged to a potential of one international volt by one international coulomb of electricity.
Page 168 - Géométrie descriptive ( 1799 ) presents a key idea behind the new descriptive geometry. Two planes are taken at right angles to each other— one vertical and the other horizontal. The figure to be represented orthogonally is projected on these planes, with the projections of all edges and vertices clearly indicated. Finally, the vertical plane is folded or rotated until it is also horizontal. The elevation and plan thus provide a diagram in two dimensions of the three-dimensional...
Page 629 - The unit of electro-motive force shall be what is known as the international volt, which is the electro-motive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of an international ampere...
Page 98 - CALORIE is the amount of heat required to raise the temperature of one kilogram of water one degree centigrade.
Page 629 - ... As a unit of electromotive force, the international volt, which is the electromotive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of one international ampere, and which is represented sufficiently well for practical use by \\\% of the electromotive force between the poles or electrodes of the voltaic cell known as Clark's cell, at a temperature of 15° C., and prepared in the manner described in the accompanying specification...
Page 254 - ... while by the second, when the coil is very close around the iron, the whole action is due to the magnetization of the iron. The natural unit of magnetism to be used in the first theory is that quantity which will repel an equal quantity at a unit's distance with a unit of force ; on the second it is the number of lines of force which pass through a unit of surface when that surface is placed in a unit field perpendicular to the lines of force. The first unit is 4ar times the second.
Page 54 - Ruhmkorff's machine, the lower strata of the air forming an insulator, -while the upper and rarer, and therefore electricallyconducting strata, may be likened to the secondary coil; and the sun perhaps likened to the primary current...
Page 207 - MAGNETISM are not forms of Energy ; neither are they forms of Matter. They may perhaps be provisionally defined as properties or Conditions of Matter; but whether this Matter be the ordinary matter, or whether it be, on the other hand, that all-pervading Ether by which ordinary matter is everywhere surrounded, is a question which has been under discussion, and which may now be fairly held to be settled in favour of the latter view.

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