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 12
... copper ( by electro - plating ) is of one ampere intensity and from what has been said the copper deposited by that current in one second cor- responds to one coulomb . A column of mercury one millimeter square and 106.24 centimeters ...
... copper ( by electro - plating ) is of one ampere intensity and from what has been said the copper deposited by that current in one second cor- responds to one coulomb . A column of mercury one millimeter square and 106.24 centimeters ...
Сторінка 29
... centimeters by the table . Sp . R x 1 R = a EXAMPLES . An electro - plater has a bath of sulphate of copper , sp . resistance 40 ohms . His electrodes are each 1 foot square and 1 foot apart . What is the RESISTANCE AND CONDUCTANCE . 29.
... centimeters by the table . Sp . R x 1 R = a EXAMPLES . An electro - plater has a bath of sulphate of copper , sp . resistance 40 ohms . His electrodes are each 1 foot square and 1 foot apart . What is the RESISTANCE AND CONDUCTANCE . 29.
Сторінка 31
... copper being taken at 1.652 mi- crohms what is the resistance of a meter and a half of copper wire 1 millimeter thick ? Solution : The diameter of the wire ( 1 millimeter ) is .1 centimeter . The square of .1 is .01 . The length of the ...
... copper being taken at 1.652 mi- crohms what is the resistance of a meter and a half of copper wire 1 millimeter thick ? Solution : The diameter of the wire ( 1 millimeter ) is .1 centimeter . The square of .1 is .01 . The length of the ...
Сторінка 33
... copper 1000 yards long , of cross - sectional area 1 square millimeter , taking the conductance of iron as that of copper ? ( Day ) . Solution : Specific Resistances : 1 7 ( i.e. the reciprocal of RESISTANCE AND CONDUCTANCE . 33.
... copper 1000 yards long , of cross - sectional area 1 square millimeter , taking the conductance of iron as that of copper ? ( Day ) . Solution : Specific Resistances : 1 7 ( i.e. the reciprocal of RESISTANCE AND CONDUCTANCE . 33.
Сторінка 39
... copper wire must be used ? Solution : The lamp current is obtained ( Ohm's law ) by dividing its voltage by its resistance , ( 188 = ampere ) . The reciprocal of the current is f ; mul- tiplied by the drop ( x 10 = 20 ) it gives the ...
... copper wire must be used ? Solution : The lamp current is obtained ( Ohm's law ) by dividing its voltage by its resistance , ( 188 = ampere ) . The reciprocal of the current is f ; mul- tiplied by the drop ( x 10 = 20 ) it gives the ...
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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.