United States Army Training ManualU.S. Government Printing Office, 1928 |
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Common terms and phrases
alternating current ammeter ampere-hour amperes armature ARMS atoms bar magnet BASIC ELECTRICIAN caliper capacity charging circuit containing coil compass computed condenser conductor connected copper core counter E. M. F. current flowing diagonal pliers diagram diameter direct current drill dry cell dynamo effect electric circuit electric current electrician's knife electrolyte electromagnetic electromotive force electrons energy filament flexible conduit flux galvanometer gauge heat hole impressed E. M. F. inch inductance insulation junction box lamp lines of force machine magnetic field maximum measured metal meter motor needle negative number of lines Ohm's law ohms parallel piece placed plate pole positive potential pressure reactance reading Repeat directions resistance rheostat RL-P rotation screw self-induction shown in Figure shunt soft iron solder splice split knob steel storage battery STUDENTS MANUAL substance surface switch terminal threads tube turns unit voltage voltmeter volts wattmeter wire zero zinc
Popular passages
Page 179 - Henry, which is the induction in a circuit when the electromotive force induced in this circuit is one international volt while the inducing current varies at the rate of one Ampere per second.
Page 172 - We do not say what gravity is, but what it does, — namely, that it is something which gives to every particle of matter a tendency toward every other particle. This influence is conveyed from one body to another without any perceptible interval of time.
Page 207 - That property of a substance that opposes the flow of an electric current through it.
Page 199 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 10" units of resistance of the CGS system of electromagnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grams in mass, of a constant cross-sectional area and of the length of 106.3 centimetres.
Page 180 - ... the electromotive force that, steadily applied to a conductor whose resistance is one international ohm, will produce a current of one international ampere...
Page 179 - As a unit of quantity, the international coulomb, which is the quantity of electricity transferred by a current of one international ampere in one second. As a unit of capacity, the international farad, which is the capacity of a condenser charged to a potential of one international volt by one international coulomb of electricity.
Page 157 - ... me that the net result on any one coil is approximately the same as if that coil alone were moved, and all the other coils were fixed, and there were no reversals of current in them. Now you can easily see that the magnetic effect of the current circulating in the coils of the armature will be to produce a north pole at n and a south pole at s.
Page 193 - The .mass of a body, or the quantity it contains is a constant quality, while the weight varies according to the variation in the force of gravity at different places.
Page 160 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, etc.
Page 298 - The other parts can be used again. To take the cells apart, lift the lids, unscrew the bolts, and remove the zinc and oxide plates. Wash off (with water) the copper frames, bolts, and rubber insulators, brightening up the metal, where corroded, with emery paper, especially the inside grooves of the copper frame sides. Pour awajr the solution carefully and set up cells with new caustic soda, oxide plates, and zincs according to directions.