The Encyclopedia Americana: A Library of Universal Knowledge, Količina 10Americana corporation, 1931 |
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Zadetki 1–3 od 45
Stran 161
... magnetic changes . For this reason instruments of the first class cannot , as a rule , be used where great accuracy ... magnetic field of the permanent magnet M , and any motion which is caused by the magnetic effect of a current flowing ...
... magnetic changes . For this reason instruments of the first class cannot , as a rule , be used where great accuracy ... magnetic field of the permanent magnet M , and any motion which is caused by the magnetic effect of a current flowing ...
Stran 199
... magnet- ized by these magnetic lines of force , tend to set themselves parallel thereto . Similarly , when an electric current flows in a wire ( elec- tro ) magnetic lines of force surround the wire in circles or hoops which increase in ...
... magnet- ized by these magnetic lines of force , tend to set themselves parallel thereto . Similarly , when an electric current flows in a wire ( elec- tro ) magnetic lines of force surround the wire in circles or hoops which increase in ...
Stran 202
... magnetic field and at right angles to the lines of magnetic force , is de- flected so that it tends to describe a circular arc ( instead of a straight line ) , in a plane perpen- dicular to the direction of the magnetic lines . It is ...
... magnetic field and at right angles to the lines of magnetic force , is de- flected so that it tends to describe a circular arc ( instead of a straight line ) , in a plane perpen- dicular to the direction of the magnetic lines . It is ...
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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