A Textbook of Electric Lighting and Railways, Volume 1International textbook Company, 1901 - Electric lighting |
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Common terms and phrases
altitude amount amperes armature base belt body boiler brushes called cell cent center of gravity cipher circle circumference commutator conductor connected core cube current flows denominator diametral pitch difference of potential direction distance divided divisor driving pulley driving wheel dynamo electricity electromotive force energy equal EXAMPLE.-What EXAMPLES FOR PRACTICE external circuit feet field magnets figure formula friction frustum galvanometer gear gear-wheel given Hence horsepower iron length lines of force machine magnetic field motion move multiplied number of lines number of revolutions number of teeth obtained Ohm's law ohms parallel plane pole position pounds pressure pulley quantity quotient r₁ ratio represent resistance revolutions per minute rheostat right angles ring rotated rule screw segments shaft shown in Fig shunt side SOLUTION SOLUTION.-Applying square inches strength of current surface tion total number triangle unit velocity voltaic voltaic cell volts watts weight wire
Popular passages
Page 19 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Page 8 - Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30| square yards = 1 square rod (sq. rd.) 160 square rods = 1 acre (A.) 640 acres = 1 square mile (sq.
Page 9 - TROY WEIGHT. 24 grains (gr.) = 1 pennyweight (pwt.). 20 pennyweights = 1 ounce (oz.). 12 ounces = 1 pound (lb.). 351. Apothecaries' weight is used in mixing medicines and in selling them at retail. APOTHECARIES
Page 9 - Cubic Measure 1728 cubic inches (cu. in.) =1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu. yd.) 128 cubic feet = 1 cord (cd...
Page 39 - The terms of a ratio are the two numbers to be compared ; thus, in the above ratio, 20 and 4 are the terms. When both terms are considered together, they are called a couplet ; when considered separately, the first term is called the antecedent, and the second term the consequent. Thus, in the ratio 20 : 4, 20 and 4 form a couplet, and 20 is the antecedent, and 4 the consequent.
Page 19 - If a straight line be drawn through two sides of a triangle, parallel to the third side, a second triangle will be formed whose sides will be proportional to the corresponding sides of the first triangle.
Page 42 - The first and fourth terms of a proportion are called the extremes, and the second and third terms, the means. Thus, in the foregoing proportion, 8 and 3 are the extremes and 4 and 6 are the means.
Page 17 - The number to be repeated is called the MULTIPLICAND ; the number which shows how many times the multiplicand is to be taken is called the MULTIPLIER ; the result of the multiplication is called the PRODUCT.
Page 5 - As a unit of current, the international ampere, which is onetenth of the unit of current of the cgs system of electromagnetic units, and which is represented sufficiently well for practical use by the unvarying current which, when passed through a solution of nitrate of silver in water, and in accordance with accompanying specifications, deposits silver at the rate of 0.001118 of a gramme per second.
Page 12 - A circle is a plane figure bounded by a curved line, called the circumference, every point of which is equally distant from a point within called the center.