The Encyclopedia Americana: A Library of Universal Knowledge, Količina 10Americana corporation, 1931 |
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Zadetki 1–3 od 76
Stran 102
... resistance is then gradually re- duced until full speed is obtained . The effect of this counter electromotive force when the resistance is cut out entirely is materially to assist the self - regulating qualities of the ma- chine . Any ...
... resistance is then gradually re- duced until full speed is obtained . The effect of this counter electromotive force when the resistance is cut out entirely is materially to assist the self - regulating qualities of the ma- chine . Any ...
Stran 113
... resistance when the temperature is raised . Its resistance decreases rapidly with an increase in tempera- ture up to the red point . Thereafter , up to the white , the resistance decreases more slowly . The ordinary carbon filament ...
... resistance when the temperature is raised . Its resistance decreases rapidly with an increase in tempera- ture up to the red point . Thereafter , up to the white , the resistance decreases more slowly . The ordinary carbon filament ...
Stran 134
... resistance is of interest , the data fur- nished by the curves of Fig . 33 give the prac- tical information required better than an at- tempted formula for calculating resistance . Efficiency . During charge , the P. D. of a lead cell ...
... resistance is of interest , the data fur- nished by the curves of Fig . 33 give the prac- tical information required better than an at- tempted formula for calculating resistance . Efficiency . During charge , the P. D. of a lead cell ...
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18th century acid alternating current American ampere hours amperes ancient anode armature battery became body book of Enoch cable called carbon cathode cell cent century charge chemical Church circuit coil conductors connected consists constitution Consult copper corpuscle cylinder direct direct current discharge effect Egypt Egyptian elec electric current electric energy electrode electrolyte electromotive force employed engine England English faradic feet France French furnace German Greek heat horse power inches industry insulated iron king known lamp later Leyden jar light lines literature London machine magnetic manufacture mass material mechanical ment metal miles motor nature negative operation oxide Paris period persons plants plate pole positive pounds pressure produced Prussia resistance Saint speed steam temperature term theory tion tricity tube United usually voltage volts vote wattmeter welding wire writing York