The Standard Electrical Dictionary: A Popular Dictionary of Words and Terms Used in the Practice of Electric Engineering

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Henley, 1892 - Počet stran: 624
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Strana 94 - CALORIE is the amount of heat required to raise the temperature of one kilogram of water one degree centigrade.
Strana 339 - ... resumes its state of rest. The intensity of the magnetic force is determined from these oscillations in the same manner that the intensity of the gravitating and electrical forces are known from the vibrations of the pendulum and the balance of torsion, and in all these cases it is proportional to the square of the number of oscillations performed in a given time...
Strana 346 - The electro-motive force is equal to the current strength multiplied by the resistance. (c) The resistance is equal to the electro-motive force divided by the current strength.
Strana 52 - ... in high latitudes they affect telegraph circuits violently. There is a strong probability that they represent electric currents or discharges. De la Rive considers them due to electric discharges between the earth and atmosphere, which electricities are separated by the action of the sun in equatorial regions. According to Balfour Stewart, auroras and earth currents (qv) may be regarded as secondary currents due to small but rapid changes in the earth's magnetism. The subject is very obscure....
Strana 438 - The sparking distance ;« is directly proportional to the quantity of electricity, and inversely proportional to the area of coated surface, or is proportional to the potential difference of the two coats. This is only true for short sparking distance, hence for accuracy the knobs should be adjusted not too far from each other. 1,ooo amperes flowing for one hour under an EMF of 1 volt; 3,6oo,ooo volt-coulombs, or 1,ooo watt-hours, are its equivalent.
Strana 287 - Poggendorff is, that the electromotive force between any two metals is equal to the sum of the electromotive forces between all the intervening metals.
Strana 375 - ... designed to trace a record of temperature changes upon a chart. Poundal. The expression "poundal" is sometimes used in connection with calculations in mechanics. Many mechanical handbooks, however, do not define it, because of its limited use. A poundal is a unit of force, and is defined as that force which, acting on a mass of one pound for one second, produces a velocity of one foot per second. A foot-poundal is a unit of energy equal to the energy resulting when a force of one poundal acts...
Strana 194 - The theory of electricity adopted throughout is that electricity, whatever its nature, is one, not two ; that electricity, whatever it may prove to be, is not matter, and is not energy ; that it resembles both matter and energy in one respect, however, in that it can neither be created nor destroyed. The doctrine of the...
Strana 260 - The mechanical equivalent of a thermal unit Fahrenheit, or the quantity of heat necessary to raise the temperature of a pound of water from 32°...
Strana 187 - The free magnetism at any given transverse section of a magnet is proportional to the difference between the square root of half the length of the magnet and the square root of the distance between the given section and the...

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