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alternating current alternating-current ampere apparatus Appendix armature atoms automatically battery cable carbon Cell.—A centimetre charge circuit commutator condenser conducting connected copper core counter-electromotive force cuit current strength cut-out device dielectric difference of potential direction discharge distinguished ductor duplex dynamo dynamo-electric machine earth effects elec electric current Electric—A electro-magnetic electrolyte electromotive force electrostatic energy farad fuse galvanometer heat Hysteretic incandescent lamp induction coil instrument insulated iron light liquid luminous magnetic field magnetic flux magnetic force means measuring metallic meter name sometimes given nected negative netic operated plate ployed polarization Polyphase positive pressure produced Quadruplex quantity ratio rent resistance rheostat rotation secondary separate shunt signals single station storage substance suitable surface switch tele telegraphic telephone switchboard temperature term proposed term sometimes applied term sometimes employed terminals tion transformer transmitted tric trolley wire tube unit vibration voltaic cell voltmeter winding word sometimes
Page 634 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 10° units of resistance of the CGS system of electro-magnetic 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 of 106.3 centimeters.
Page 567 - As a unit of current, the international ampere., which is one-tenth of the unit of current of the CGS system of electro-magnetic units, and »hich is represented sufficiently well for practical use by the unvarying current which, when passed through a solution of nitrate of silver in water, and, in accordance with accompanying specifications,1 deposits silver at the rate of 0-001118 of a gramme per second.
Page 815 - Henry, which is the induction in a circuit when the electro-motive force induced in this circuit is one international volt while the inducing current varies at the rate of one Ampere per second.
Page 807 - When a ray of light passes from one medium to another, it is refracted so that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocities in the two media.
Page 620 - ... units of work in the CGS system, and which is represented sufficiently well for practical use by the energy expended in one second by an international ampere in an international ohm.
Page 544 - Volt. — The practical unit of electromotive force. Such an electromotive force as is induced in a conductor which cuts lines of magnetic flux at the rate of 100,000,000 per second. Such an electromotive force as would cause a current of one ampere to flow through a resistance of one ohm.
Page 690 - Avogadro's law states that equal volumes of all gases at the same temperature and pressure contain the same number of molecules.
Page 676 - Ampere. — The practical unit of electric current. A rate of flow of electricity transmitting one coulomb per second. The current of electricity which would pass through a circuit whose resistance is one ohm under an electromotive force of one volt.