Electrical Engineering for Electric Light Artisans and Students: (embracing Those Branches Prescribed in the Syllabus Issued by the City and Guilds Technical Institute)Longmans, Green, 1895 - 753 páginas |
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Página 17
... length of the column . At another Congress , held at Chicago in 1893 , it was decided that the length of the mercury column should be 106.3 centimetres , and that the name of this unit should be the ' international ' ohm ; but this unit ...
... length of the column . At another Congress , held at Chicago in 1893 , it was decided that the length of the mercury column should be 106.3 centimetres , and that the name of this unit should be the ' international ' ohm ; but this unit ...
Página 21
... length of a conductor we invariably increase its resistance . This follows as a matter of course from the fact that if we urge a certain current through a wire of increased length , we give it more work to do , necessitating ...
... length of a conductor we invariably increase its resistance . This follows as a matter of course from the fact that if we urge a certain current through a wire of increased length , we give it more work to do , necessitating ...
Página 22
... length that is to say , if we vary the length of the conductor we vary its resistance at exactly the same rate , or , in fewer words , resistance varies directly as the length of the conductor . If a mile of wire of a certain gauge ...
... length that is to say , if we vary the length of the conductor we vary its resistance at exactly the same rate , or , in fewer words , resistance varies directly as the length of the conductor . If a mile of wire of a certain gauge ...
Página 31
... length of wire would probably be inconveniently great . For low resistances , how- ever , this is not so important ; in fact , if a metal of high specific resistance is then used , the wire must be comparatively thick , otherwise it ...
... length of wire would probably be inconveniently great . For low resistances , how- ever , this is not so important ; in fact , if a metal of high specific resistance is then used , the wire must be comparatively thick , otherwise it ...
Página 35
... length should be measured off and then doubled in the middle , the two halves being wound on together . The meaning of this will perhaps be more apparent on referring to the illustration ( fig . 9 ) . The double winding is more easily ...
... length should be measured off and then doubled in the middle , the two halves being wound on together . The meaning of this will perhaps be more apparent on referring to the illustration ( fig . 9 ) . The double winding is more easily ...
Otras ediciones - Ver todas
Electrical Engineering for Electric Light Artisans and Students: (Embracing ... Sir William Slingo,Arthur Brooker Sin vista previa disponible - 2015 |
Electrical Engineering for Electric Light Artisans and Students: (Embracing ... William Slingo,Arthur Brooker Sin vista previa disponible - 2015 |
Términos y frases comunes
acid alternating current ammeter amount ampere-hours amperes apparatus arc lamp armature core battery brass brushes candle candle-power carbon cell commutator conductor connected considerable convolutions copper Crown 8vo current flowing current strength curve Daniell cell deflection developed diameter direct current direction dynamo eddy currents effect electrical electro-magnet electro-motive force employed equal external circuit external resistance field field-magnet coils filament fixed galvanometer heat illustrated in fig inch increase instrument insulated lamp length light lines of force machine magnetic magnetising maximum measured mercury metal motor needle negative number of lines obtained ohms pair parallel piece placed plates pole pole-pieces portion position potential difference practice pressure proportional reduced result revolutions per minute ring rotation round screw secondary self-induction shaft shown in fig shunt soft iron solenoid speed steel strip sulphate surface switch temperature terminals tion tube varies voltmeter volts watts wire wound zinc
Pasajes populares
Página 635 - To explain the construction of the common barometer, and to shew that the mercury is sustained in it by the pressure of the air on the surface of the mercury in the basin.
Página 582 - ... a few words on the subject may not be out of place.