Proceedings of the International Electrical Congress Held in the City of Chicago, August 21st to 25th, 1893American Institute of Electrical Engineers, 1894 - 488 σελίδες |
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
alloys alternating current amperes apparatus arc lamp armature C₁ C₂ cable candle capacity carbon cent Chairman circuit coefficient coils commutator condenser conductor Congress connected constant continuous current crater curves diagrams dielectric direct current discussion distance distribution dynamo effect efficiency electrical engineering electricians electro-magnetic electrodes electromotive force energy equations experiments galvanometer german-silver give harmonic hence horse power hysteresis incandescent increase insulation iron L₁ L₂ lamp length light machine magnetic leakage manholes maximum means measurements mercury method miles motor mutual induction obtained ohms ordinary paper photometer pipe polyphase system position potential practical Preece primary current Prof pump quantity R₁ R₂ resistance rotary transformer secondary current self-induction shunts sine-wave single phase standard surface telephone temperature tension Tesla motor Thompson tion transformer transmission of power tube variation voltage voltmeter volts watts wick zero
Δημοφιλή αποσπάσματα
Σελίδα 20 - As a Unit of Resistance, the International Ohm, which is based upon the ohm equal to io9 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 of 106.3 centimetres.
Σελίδα 17 - As a unit of resistance, the international ohm, which is based upon the ohm, equal to 109 units of resistance of the Centimeter-Gramme-Second 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.
Σελίδα 17 - 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 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 accompanying specifications,1 deposits silver at the rate of o.oo1 1 1 8 of a gramme per second.
Σελίδα 17 - 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...
Σελίδα 21 - IOT 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. " As a unit of power, the watt, which is equal to 10...
Σελίδα 20 - The liquid should consist of a neutral solution of pure silver nitrate, containing about 15 parts by weight of the nitrate to 85 parts of water. The resistance of the voltameter changes somewhat as the current passes. To prevent these changes having too great an effect on the current some resistance besides that of the voltameter should be inserted in the circuit.
Σελίδα 19 - 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.
Σελίδα 20 - 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.
Σελίδα 20 - ... is passed through a solution of nitrate of silver in water. The silver voltameter measures the total electrical quantity which has passed during the time of the experiment, and by noting this time the time average of the current, or, if the current has been kept constant, the current itself, can be deduced. In employing the silver voltameter to measure currents of about one ampere the following arrangements should be adopted: — The cathode on which the silver is to be deposited should take...
Σελίδα 20 - In the following specification the term ' silver voltameter' means the arrangement of apparatus by means of which an electric current is passed through a solution of nitrate of silver in water. The silver voltameter measures the total electrical quantity which has passed during the time of the experiment, and by noting this time the time average of the current, or, if the current has been kept constant, the current itself can be deduced.