A Treatise on Electricity and Magnetism, Volume 1T. De La Rue, 1883 |
Contents
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Common terms and phrases
angle axes axis battery body centre charge circuit co-ordinates coefficient components condition conductor consider constant corresponding curve cylinder deduced density diamagnetic dielectric difference of potential direction displacement distance electrical masses electrified electrodes electromagnetic electromotive force element ds energy equal to unity equation equilibrium equipotential surfaces expression F₁ flow of force function given gives H₂ heat infinitely small insulated interior inversely Joule's law Laplace's equation layer lines of force M₁ magnetic force magnetic induction magnetic mass magnetic moment magnetic shell magnetisation maximum medium metals needle negative null Ohm's law opposite signs parallel perpendicular phenomena plane polarization pole positive produced proportional quantity of electricity R₁ radius ratio represents resistance resultant right line rotation S₁ solenoid sphere strength temperature theorem traverses uniform field unit V₁ V₂ variation velocity wire zero
Popular passages
Page 574 - ... drawn ; but I believe it can be demonstrated that no other explanation of that fact is possible. Hence it appears that Faraday's optical discovery affords a demonstration of the reality of Ampere's explanation of the ultimate nature of magnetism ; and gives a definition of magnetization in the dynamical theory of heat. The introduction of the principle of moments of momenta ("the conservation of areas") into the mechanical treatment of Mr. Rankine's hypothesis of
Page 575 - The explanation of all phenomena of electromagnetic attraction or repulsion, and of electromagnetic induction, is to be looked for simply in the inertia and pressure of the matter of which the motions constitute heat.
Page 574 - The magnetic influence on light discovered by Faraday depends on the direction of motion of moving particles. For instance, in a medium possessing it, particles in a straight line parallel to the lines of magnetic force, displaced to a helix round this line as axis, and then projected tangentially with such velocities as to describe circles, will have different velocities according as their motions are round in one direction (the same as the nominal direction of the galvanic current in the magnetizing...
Page 92 - ... 1298. Induction appears to consist in a certain polarized state of the particles, into which they are thrown by the electrified body sustaining the action, the particles assuming positive and negative points or parts, which are symmetrically arranged with respect to each other and the inducting surfaces or particles*. The state must be a forced one, for it is originated and sustained only by force, and sinks to the normal or quiescent state when that force is removed. It can be continued only...
Page 653 - THE LAWS OF ECARTE, ADOPTED BY THE TURF CLUB, with a TREATISE ON THE GAME, by "CAVENDISH.
Page 574 - ... forces which are balanced by centrifugal force of the circular motions are equal, while the luminiferous motions are unequal. The absolute circular motions being therefore either equal or such as to transmit equal centrifugal forces to the particles initially considered, it follows that the luminiferous motions are only components of the whole motion ; and that a less luminiferous component in one direction, compounded with a motion existing in the medium when transmitting no light, gives an...
Page 574 - ... with such velocities as to describe circles, will have different velocities according as their motions are round in one direction (the same as the nominal direction of the galvanic current in the magnetizing coil), or in the contrary direction. But the elastic reaction of the medium must be the same for the same displacements, whatever be the velocities and...
Page 92 - The direct inductive force, which may be conceived to be exerted in lines between the two limiting and charged conducting surfaces, is accompanied by a lateral or transverse force equivalent to a dilatation or repulsion of these representative lines...