Magnets and Electric Currents: An Elementary Treatise for the Use of Electrical Artisans and Science Teachers |
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Page xiii
... Iron and Steel - Perme- ability and Flux Density for various Magnetic Forces - Hysteresis Curves - Physical Meaning ... Iron on Magnetisation - Effect of Heat on Mag- netic Properties of Iron - Magnetic Theories .. .. . 177 CHAPTER VIII ...
... Iron and Steel - Perme- ability and Flux Density for various Magnetic Forces - Hysteresis Curves - Physical Meaning ... Iron on Magnetisation - Effect of Heat on Mag- netic Properties of Iron - Magnetic Theories .. .. . 177 CHAPTER VIII ...
Page 1
... iron filings , a bundle of steel knitting needles , a skein of floss silk , some fine copper binding wire , a few iron nails , and also small screws of iron , steel , and brass . In ad- dition include , if possible , one or two small ...
... iron filings , a bundle of steel knitting needles , a skein of floss silk , some fine copper binding wire , a few iron nails , and also small screws of iron , steel , and brass . In ad- dition include , if possible , one or two small ...
Page 2
... iron , furnishes a source of very pure iron . It occurs also in New Zealand , Scot- land , India and other localities , in a finely granular state known as iron sand , and this is also a source from which an excellent quality of iron ...
... iron , furnishes a source of very pure iron . It occurs also in New Zealand , Scot- land , India and other localities , in a finely granular state known as iron sand , and this is also a source from which an excellent quality of iron ...
Page 3
... iron ore is , that if an elongated mass of it , having two well - defined poles at the extremities , is suspended by a thread or floated upon water in a little wooden cup , it always tends to place itself with the line joining the poles ...
... iron ore is , that if an elongated mass of it , having two well - defined poles at the extremities , is suspended by a thread or floated upon water in a little wooden cup , it always tends to place itself with the line joining the poles ...
Page 4
... iron and steel when placed in contact with it . Take a steel knitting needle , and having ascertained , by dipping the end of it in iron filings , that it is free from magnetism , stroke the knitting needle , say twenty times , over the ...
... iron and steel when placed in contact with it . Take a steel knitting needle , and having ascertained , by dipping the end of it in iron filings , that it is free from magnetism , stroke the knitting needle , say twenty times , over the ...
Other editions - View all
Magnets and Electric Currents. an Elementary Treatise for the Use of ... J. A. Fleming No preview available - 2008 |
Common terms and phrases
acid alternating current ammeter ampere-hour ampere-turns amperes angle armature axis battery C.G.S. units called carbon cell Clark cell conductor constant constructed continuous current copper wire crown 8vo cubic centimetre current flowing current in amperes curve deflection diagram difference of potential direction dynamo electric current electrodynamometer electrolyte electromagnet electromotive force ends energy Engineers equal field magnet fixed galvanometer grammes heat Hence illus inch inductance instant instrument insulated iron core length machine magnetic circuit magnetic field magnetic flux density magnetic force magnetic pole magnetising magnetomotive force mean measured metals meter movable coil needle netic North pole passed permeability plates position potential difference potentiometer primary current produced quantity R.M.S. value represent resistance ring coil rotation round scale Second edition secondary circuit shunt soft iron solenoid square centimetre steel strength tangent temperature terminals transformer tube velocity voltage voltmeter volts watt-hour wattmeter watts York zinc ΙΟ
Popular passages
Page 123 - Ampere, which is one-tenth 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, in accordance with a certain specification, deposits silver at the rate of 0.001118 of a gramme per second.
Page 55 - Engineering Law. By A. HARING. Demy 8vo, cloth. (New York.) Vol. I. THE LAW OF CONTRACT. 518 pp. (1911) net 17 o The Gyroscope, an Experimental Study.
Page 123 - 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 124 - Now, therefore, her Majesty, by virtue of the power vested in her by the said Act, by and with the advice of her Privy Council, is pleased to approve the several denominations of standards set forth in the schedule hereto as new denominations of standards for electrical measurement.
Page 124 - The Volt, which has the value IO8 in terms of the centimetre the gramme and the second of tune being the electrical pressure that if steadily applied to a conductor whose resistance is one ohm will produce a current of one ampere, and which is represented by -6974 (jgg) of the electrical pressure at a temperature of 15° C.
Page 12 - The Drainage of Fens and Low Lands by Gravitation and Steam Power. By WH Wheeler. 8 plates, 175 pp., 8vo. (1888.) 12s.
Page 22 - Gas Works : their Arrangement, Construction, Plant and Machinery. By F. Colyer. 31 folding plates, 134 pp., 8vo. (1884.) 8s. 6d. net. Lighting by Acetylene. By F.
Page 23 - HISTORICAL AND BIOGRAPHICAL. Extracts from the Private Letters of the late Sir William Fothergill Cooke, 1836-9, relating to the Invention and Development of the Electric Telegraph ; also a Memoir by LATIMER CLARK. Edited by FHWEBB, Sec.
Page 30 - Tables of Logarithms and Trigonometric Functions. By EV Huntington. Ninth thousand, 34 pp., square 8vo, limp buckram, with cut lateral index. (New York, 1911.) 3s.
Page 41 - Organization of Gold Mining Business, with Specimens of the Departmental Report Books and the Account Books. By Nicol Brown. Second edition, 220 pp., fcap. folio. (1903.) £1 5s.