Arithmetic of Electricity: A Practical Treatise on Electrical Calculations of All Kinds Reduced to a Series of Rules, All of the Simplest Forms, and Involving Only Ordinary Arithmetic ...N.W. Henley Publishing Company, 1909 - 162 стор. |
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Сторінка 4
... tion with a continued demand for this work have made advisable a revision and extension of this book . The author feels that in the matter which has been added much more could have been said on the subjects treated of , but , since a ...
... tion with a continued demand for this work have made advisable a revision and extension of this book . The author feels that in the matter which has been added much more could have been said on the subjects treated of , but , since a ...
Сторінка 6
... tion to Time . - Specific Heat . - Heating of Wire by a Current . - Safety Fuses . - Work of a Current . - Elec- trical Horse - Power . - Duty and Efficiency of Electrical Generators .... 50 CHAPTER VIII . BATTERIES . Arrangement of ...
... tion to Time . - Specific Heat . - Heating of Wire by a Current . - Safety Fuses . - Work of a Current . - Elec- trical Horse - Power . - Duty and Efficiency of Electrical Generators .... 50 CHAPTER VIII . BATTERIES . Arrangement of ...
Сторінка 15
... tion , add together the E. M. F of all generators of like polarity , thus obtaining two opposed E. M. F.s. Sub- tract the smaller E. M. F. from the larger E. M. F. to obtain the effective E. M. F. Then apply Ohm's law OHM'S LAW . 15.
... tion , add together the E. M. F of all generators of like polarity , thus obtaining two opposed E. M. F.s. Sub- tract the smaller E. M. F. from the larger E. M. F. to obtain the effective E. M. F. Then apply Ohm's law OHM'S LAW . 15.
Сторінка 21
... resistance coil . Another problem in connection with paralle branches of a circuit is the combined resistance of parallel circuits . This is not a case of summa- tion , for it is evident that the more parallel OHM'S LAW . 21.
... resistance coil . Another problem in connection with paralle branches of a circuit is the combined resistance of parallel circuits . This is not a case of summa- tion , for it is evident that the more parallel OHM'S LAW . 21.
Сторінка 22
... tion , for it is evident that the more parallel paths there are provided for the current , the less will be the resistance . Rule 10. In shunt circuits , the resistance of the com- bined shunts is expressed by the reciprocal of the sum ...
... tion , for it is evident that the more parallel paths there are provided for the current , the less will be the resistance . Rule 10. In shunt circuits , the resistance of the com- bined shunts is expressed by the reciprocal of the sum ...
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50 cents 50 ohms 50 volts air gaps alternating current ampere turns ance appliances armature core battery C. G. S. units calculated calories capacity cells in parallel cells in series circular mils coefficient of leakage coil conductance conductor copper coulombs cross-sectional area cycles per second difference of potential distance divided drop dynamo efficiency electromotive force energy engines EXAMPLE expressed external circuit factors farad field resistance fractions given gives gram heat developed horse power horse-power inductance internal resistance joules kilogram-meter lamps in parallel leads length lines of force lines per square magnet core magnetic circuit meter microfarad microhms mils in diameter motor multiplied number of cells number of turns Ohm's law ohms resistance permeability permeance proportion ratio of conversion reciprocal reduced reluctance Rule 55 Rules 30 sectional area shunt Solution specific resistance square centimeter square inch tion turns of wire voltage weight wrought iron
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Сторінка 50 - This loss as previously explained, is equal to the square of the current multiplied by the resistance. The...
Сторінка 13 - The strength of the current is equal to the electro-motive force divided by the resistance...
Сторінка 57 - Specific Heat. The specific heat of a substance is the ratio of the heat required to raise the temperature of unit weight of the substance 1 deg.