## Reports of the Committee on Electrical Standards Appointed by the British Association for the Advancement of Science: Reprinted by Permission of the Council; a Record of the History of "absolute Units" and of Lord Kelvin's Work in Connexion with TheseUniversity Press, 1913 - 783 páginas |

### Índice

1 | |

14 | |

92 | |

104 | |

159 | |

165 | |

180 | |

190 | |

198 | |

209 | |

219 | |

229 | |

269 | |

271 | |

277 | |

291 | |

317 | |

325 | |

332 | |

339 | |

360 | |

373 | |

397 | |

411 | |

419 | |

433 | |

564 | |

576 | |

592 | |

600 | |

607 | |

608 | |

615 | |

647 | |

659 | |

662 | |

674 | |

682 | |

697 | |

712 | |

744 | |

774 | |

777 | |

### Outras edições - Ver tudo

Reports of the Committee on Electrical Standards Appointed by the British ... British Association for the Advancement,Frank Edward Smith Pré-visualização indisponível - 2015 |

### Palavras e frases frequentes

absolute measure absolute unit accuracy acid adopted alloy ampère annealed apparatus Appendix B. A. unit battery Board of Trade British Association C.G.S. units cadmium capacity cell cent centimetres circuit Clark cell Committee compared comparison condenser conducting power conductor connexion constant constructed correction deflection determined diameter difference of potentials distance Dr Matthiessen electrical resistance Electrical Standards electro-magnetic electromotive force equal equation error experiments F. E. Smith Fleeming Jenkin galvanometer German-silver given glass Glazebrook gold-silver alloy gramme hard-drawn heat induction instrument insulated Joule length Lord Rayleigh magnetic field manganin mean mercurous sulphate mercury mercury standards method metre millimetre National Physical Laboratory observations obtained permeance Phil platinum pole practical produced Professor pure metals quantity of electricity R₁ ratio Report Siemens solution standard coil standards of resistance Table temperature coefficient tested thermometer Thomson tube unit of resistance Weber weight zinc zinc sulphate

### Passagens conhecidas

Página 510 - 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.

Página 465 - 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 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 grams in mass, of a constant cross-sectional area and of the length of 106.3 centimetres.

Página 487 - As a unit of current, the international ampere, which is onetenth 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, and in accordance with accompanying specifications deposits silver at the rate of 0-001118 of a gram per second.

Página 470 - 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.

Página 753 - The International Ampere is the unvarying electric current which, when passed through a solution of nitrate of silver in water, in accordance with the specification II. attached to these resolutions, deposits silver at the rate of 0'00l 11800 of a gramme per second.

Página 512 - 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.

Página 754 - 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...

Página 488 - The unit of quantity shall be what is known as the international coulomb, which is the quantity of electricity transferred by a current of one international ampere in one second. Fifth. The unit of capacity shall be what is known as the international farad, which is the capacity of a condenser charged to a potential of one international volt by one international coulomb of electricity.

Página 763 - Now, therefore, His Majesty, by virtue of the power vested in Him by the said Act, by and with the advice of His Privy Council, is pleased to...

Página 489 - As a unit of work, the joule, which is equal to 107 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...