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 13
... factors are always pres- ent in such a circuit . Its general statement is as follows : In an active electric circuit the current is equal to the electromotive force divided by the resistance . This law can be expressed in various ways ...
... factors are always pres- ent in such a circuit . Its general statement is as follows : In an active electric circuit the current is equal to the electromotive force divided by the resistance . This law can be expressed in various ways ...
Сторінка 31
... factors , thus avoiding all calculation . Rule 17. The resistance in microhms of a wire of given diameter in centimeters is equal to the product of the specific resistance by 1.2737 by the length in centi- meters divided by the square ...
... factors , thus avoiding all calculation . Rule 17. The resistance in microhms of a wire of given diameter in centimeters is equal to the product of the specific resistance by 1.2737 by the length in centi- meters divided by the square ...
Сторінка 32
... factors to be multiplied together for a divisor , and on the right side factors to be multi- plied together for a dividend . In the expression of the rule as below the quotient is 1 , in other words the product of all the factors on the ...
... factors to be multiplied together for a divisor , and on the right side factors to be multi- plied together for a dividend . In the expression of the rule as below the quotient is 1 , in other words the product of all the factors on the ...
Сторінка 33
... factors omitted as unnecessary . ) 1050 X .09 ÷ 500.189 ohms . What is the diameter of a wire 2 miles long of 23 ohms resistance , if a mile of wire of similar ma- terial of seventy mils diameter has a resistance of 10.82 ohms ...
... factors omitted as unnecessary . ) 1050 X .09 ÷ 500.189 ohms . What is the diameter of a wire 2 miles long of 23 ohms resistance , if a mile of wire of similar ma- terial of seventy mils diameter has a resistance of 10.82 ohms ...
Сторінка 34
... factors in two columns headed by these designations . Then the formula can be applied with less chance of error . Thus for the last two problems the columns should be thus arranged . α Area , 4 sq . mils . L. Unknown 34 ARITHMETIC OF ...
... factors in two columns headed by these designations . Then the formula can be applied with less chance of error . Thus for the last two problems the columns should be thus arranged . α Area , 4 sq . mils . L. Unknown 34 ARITHMETIC OF ...
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Загальні терміни та фрази
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.