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 |
Dentro del libro
Resultados 1-5 de 60
Página 347
... lamps would be 100 × 1 = 10 volts ; but when only one- tenth of the lamps are in use the current would be 10 amperes , and the fall potential in the mains only 10 × 1 = 1 volt . From this it is clear that if the lamps required a ...
... lamps would be 100 × 1 = 10 volts ; but when only one- tenth of the lamps are in use the current would be 10 amperes , and the fall potential in the mains only 10 × 1 = 1 volt . From this it is clear that if the lamps required a ...
Página 447
... lamps joined in series as its maximum load , the number of lamps actually switched in circuit may vary considerably from time to time ; but the act of switching out a lamp by short - circuiting it , reduces the external resistance , and ...
... lamps joined in series as its maximum load , the number of lamps actually switched in circuit may vary considerably from time to time ; but the act of switching out a lamp by short - circuiting it , reduces the external resistance , and ...
Página 450
... lamps maintained in either case , the difference will be found to be comparatively small , especially if some of the lamps are at a distance from the machines , because in the case of arc - lamps driven in parallel from a low - pressure ...
... lamps maintained in either case , the difference will be found to be comparatively small , especially if some of the lamps are at a distance from the machines , because in the case of arc - lamps driven in parallel from a low - pressure ...
Página 529
... lamps joined up in parallel , therefore , it would be necessary , on cutting any one of them out , to substitute an ... lamp which it replaces . In such a series transformer the number of turns in the secondary is , as a rule , equal to ...
... lamps joined up in parallel , therefore , it would be necessary , on cutting any one of them out , to substitute an ... lamp which it replaces . In such a series transformer the number of turns in the secondary is , as a rule , equal to ...
Página 532
... lamp , the lamp is less brilliantly lighted than by an alternating current whose maximum reaches one ampere , and whose average value is therefore 0.637 ampere , which clearly shows that more work is being done in the latter than in the ...
... lamp , the lamp is less brilliantly lighted than by an alternating current whose maximum reaches one ampere , and whose average value is therefore 0.637 ampere , which clearly shows that more work is being done in the latter than in the ...
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.