Elementary Electricity Up-to-date: A Complete, Practical Guide for the Beginner in the Study of Electricity and Electrical Experiments, Magnets, Magnetism, in All Its Various Aspects ...F.J. Drake & Company, 1918 - 431 стор. |
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action air gap alternating current ampere turns amperes Answer apparatus armature attracted breaker brushes called capacity carbon cause choke coil cloud commutator condenser conductor connected copper copper element cuit cylinders density dielectric direct current discharge point dynamo earth effect elec electroscope flux foil frequency fuse glass rod ground wire heat horn arrester hydrometer inch induced insulator iron jump lamps LESSON leyden jar lightning arresters line wires lines of force machine magnetic north pole magnetizing force material metal mils motor multigap arrester needle negative charge neutral normal current north pole Ohm's law ohms path permeability piece pith ball placed plate polarity positive pressure produce protection Question 13 reluctance repelled resistance rotary converter shellac short circuit shown in Fig shunt side flash solenoid solution spark static electricity steel storage battery sulphate sulphuric acid surface surge switch synchronism tion transformers tricity volts zinc
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Сторінка 132 - MASS AND WEIGHT.— The mass of a body is the quantity of matter in it ; the weight of a body is due to the force of gravity acting upon this matter.
Сторінка 38 - Although bodies cannot be charged throughout their substance, the electricity being always on the surface of the body ; yet clouds seem to be electrified all the way through. This is because a collection of little particles of water, like a rain cloud, can have a charge on the surface of each particle. As the particles of water fall by gravitation many touch and unite, so that the charges of say eight small drops are now in a drop weighing eight times as much, but which has only half the surface...
Сторінка 60 - a. Must be attached to each side of every overhead circuit connected with the station. It is recommended to all electric light and power companies that arresters be connected at intervals over systems in such numbers and so located as to prevent ordinary discharges entering (over the wires) buildings connected to the lines.
Сторінка 60 - Must be connected with a thoroughly good and permanent ground connection by metallic strips or wires having a conductivity not Less than that of a No. 6 B. & S.
Сторінка 177 - Style | Price Electrical Books — Continued Electrical Measurements and Meter Testing Cloth $1.00 Drake's Telephone Handbook.... Lea. 1.50 Drake's Telephone Handbook Cloth 1.00 Elementary Electricity, Up-toDate *Cloth 1.25 Electricity Made Simple "Cloth 1.00 Easy Electrical Experiments *Cloth 1.00 Wireless Telegraph and Telephone Handbook Cloth 1.00 Telegraphy, Self-taught Cloth 1.00 Dynamo-Electric Machines Cloth 1.50 Electro-Plating Handbook Lea. 1.50 Electro-Plating Handbook Cloth 1.00 Modern...
Сторінка 115 - ... plates. Contraction and expansion of the active material may take place in normal working, and are increased by excessive rates or limits of charging and discharging. This constitutes another cause of disintegration, particularly in plates of the Faure type containing plugs or pellets of lead paste. The fragments which fall from the plates not only involve a loss of material, but are also likely to extend across or gather between the plates, and cause a short circuit. The positive plates are...
Сторінка 125 - I mil in diameter is a mil-foot. Resistance and Conductivity. If we take a piece of wire whose resistance is 1 ohm, and apply an EMF to the ends of it, we find that it is able to conduct electricity. We might say that this piece of wire has unit conducting power, or unit conductivity, as well as unit resistance. If we take another piece of the same wire, but twice the length of the former piece, it will have twice the resistance, that is, it will conduct electricity only half as well as the former...
Сторінка 157 - A represents the alternator, B its brushes and D and E the mains to the transformer H. This transformer consists of a core of iron C on which are two. windings. The coil P is called the primary and is connected to the main from alternator. The other coil S is called the secondary and to it the load is connected. Whatever the voltage of alternator A that of the secondary circuit FLG will be three-eighths of it Fig.
Сторінка 177 - Electrical Tables and Engineering Data *Lea. $1.50 Electrical Tables and Engineering Data *Cloth 1.00 Motion Picture Operation *Lea. 1.50 Motion Picture Operation *Cloth 1.00 Alternating Current Lea. 1.50 Alternating Current Cloth 1.00 Wiring Diagrams and Descriptions *Lea. 1.50 Wiring Diagrams and Descriptions *Cloth 1.00 Armature and Magnet Winding. .*Lea. 1.50 Armature and Magnet Winding. .*Cloth 1.00 Modern Electric Illumination. .. .*Lea. 1.50 Modern Electric Illumination *Cloth 1.00 Modern...
Сторінка 41 - Place the subject on his back, head down and bent backward, arms folded under the head (under no conditions raise the head from the ground or floor). Place a hard roll of clothing beneath the body, with the shoulders declining slightly over it. Open, the mouth, pull the tongue forward, and with a cloth wipe out saliva or mucus. Thoroughly loosen the clothing from the neck to the waist, but do not leave the subject's body exposed, for it is essential to keep the body warm ; kneel astride the subject's...