Medical Electricity, Röntgen Rays and Radium: With a Practical Chapter on PhototherapyW.B. Saunders Company, 1915 - 1219 стор. |
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Загальні терміни та фрази
acid alternating current amount amperage amperemeter amperes anode anticathode apparatus applied armature battery body cathode cause circuit condenser conducting conductor connected copper cord current passing d'Arsonval diameter difference in potential direct current distance dynamo effect effluve elec electric current electric-light electrolyte electromagnet electromotive force exposure faradic faradic current flow galvanic current galvanometer glass heat high-frequency currents high-tension incandescent inches increased induction coil induction-coil insulated interrupter ions iron lamp latter Leyden jar light liquid magnet mercury metal milliamperes minutes motor muscle muscular contraction needle nerve ohms ordinary Oudin resonator paralysis patient plate platinum polarity primary coil primary current produced radiograph resistance rheostat secondary coil secondary current self-induction shows skin solution spark spark-gap spiral static machine stimulation strength of current substance surface therapeutic tion tissues transformer treatment turned ultraviolet rays vacuum electrode voltage voltaic cell volts Wehnelt wire x-ray coil x-ray tube zinc
Популярні уривки
Сторінка 171 - The gram calorie, or small calorie (cal.), is the amount of heat required to raise the temperature of 1 gram of water 1°...
Сторінка 160 - Must be so placed in wet places that an air space will be left between conductors and pipes in crossing, and the former must be run in such a way that they cannot come in contact with the pipe accidentally. Wires should be run over, rather than under, pipes upon which moisture is likely to gather or which, by leaking, might cause trouble on a circuit.
Сторінка 176 - The lower limit Is specified for rubber-covered wires to prevent gradual deterioration of the high insulations by the heat of the wires, but not from fear of igniting the insulation. The question of drop is not taken into consideration in the above tables.
Сторінка 154 - Such an electromotive force as would cause a current of one ampere to flow through a resistance of one ohm.
Сторінка 160 - Must not be placed in the immediate vicinity of easily ignitible stuff or where exposed to inflammable gases or dust or to flyings of combustible material.
Сторінка 160 - Must be so spliced or joined as to be both mechanically and, electrically secure without solder. The joints must then be soldered to insure preservation and covered with an insulation equal to that on the conductors.
Сторінка 155 - The current in amperes is equal to the electromotive force in volts divided by the resistance in ohms.
Сторінка 176 - That is, the resistance is inversely proportional to the fourth power of the diameter of the wire. If the ampere-turns are kept constant, then £-="- (-M C -»" ' in which C and C' are the currents necessary with « and «
Сторінка 202 - The amounts of different substances liberated by the same quantity of electricity are proportional to their chemic equivalent weights.
Сторінка 215 - The tube is open at one end and closed at the other by a movable piston. A tuning fork near the open end is vibrating with a frequency of 500 cycles/sec.