Electricity, Magnetism, and Electric Telegraphy: A Practical Guide and Hand-book of General Information for Electrical Students, Operators, and Inspectors |
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Common terms and phrases
adjusted apparatus applied armature arranged attached attracted bell binding-screws branch brass break bridge cable called carbon caused charged clocks closed coil conductor connected constructed copper copper wire core cuit current electricity Daniell cell deflection diaphragm direction distance duplex dynamo-electric machine earth elec electric current electric light electro-magnet electro-motive force employed galvanometer gauge ground ground-wire gutta-percha inches increased induced induction-coil instrument insulated internal resistance iron wire lamp lever Leyden jar line-wire local battery magneto-electric measured metal method mile needle ohms operated opposite pass permanent magnet placed plate plug polarized pole porous cup practical principle produced relay rheostat screw secondary shown in Figure shunt side Siemens signals soft-iron sounder spring strength of current switch tangent tangent galvanometer tele telegraph lines telephone terminal station tery testing tion transmitter tricity unplug usually vibrations voltaic battery Wheatstone Wheatstone bridge zinc
Popular passages
Page 355 - There was a time when I thought I knew something about the matter; but the longer I live, and the more carefully I study the subject, the more convinced I am of my total ignorance of the nature of electricity.
Page 38 - Cells thus placed are said to be arranged in series. When thus arranged, the electromotive force of each cell is added to that of its neighbor, and the resulting electromotive force is equal to the sum of the electromotive forces of all the cells. Assuming the EMF of each cell in Fig. 13 to be i volt, the total EMF developed...
Page 174 - Fahrenheit, and the resistance be increased a certain amount by a rise of one degree in temperature, it will be increased by the next •degree of rise at the same rate per cent., calculated on the original resistance, plus the amount increased by the first degree of rise.
Page 272 - To this loss must be added the one per cent, due to that amount of current diverted from the arc by the fine-wire regulating helix, making a total loss of 3.91 per cent. The remaining 96.09 per cent, of the whole energy absorbed in each lamp appears in the arc between its carbons. The shunting or...
Page 98 - oil is so wound that each turn lies in a plane approximately parallel to the axis of the needle or magnet when at rest. The current in passing through the coil or bobbin of insulated wire produces a magnetic field in the space in which the needle hangs and tends to swing the...