Magnets and Electric Currents: An Elementary Treatise for the Use of Electrical Artisans and Science Teachers |
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Page xiv
... Scale Errors - Curves of Calibration - Alter- nating Current Instruments - Siemens Electrodynamometer- Kelvin Ampere Balances - Hot - wire Instruments -- Cardew Volt- meter - Electromagnetic Instruments - Electrostatic Voltmeters ...
... Scale Errors - Curves of Calibration - Alter- nating Current Instruments - Siemens Electrodynamometer- Kelvin Ampere Balances - Hot - wire Instruments -- Cardew Volt- meter - Electromagnetic Instruments - Electrostatic Voltmeters ...
Page 2
... scale or oxide which is de- tached from iron when it is heated red - hot and forged under the hammer . This ore of iron has been known for long ages past to be possessed in varying degrees of two remarkable pro- perties which are called ...
... scale or oxide which is de- tached from iron when it is heated red - hot and forged under the hammer . This ore of iron has been known for long ages past to be possessed in varying degrees of two remarkable pro- perties which are called ...
Page 50
... scale proportional to the magnitude of the force . If two forces acting on a point are represented by two lines , and if we complete T Fig . 12. - Forces acting on a Small Magnet when placed in the field of a larger one . the ...
... scale proportional to the magnitude of the force . If two forces acting on a point are represented by two lines , and if we complete T Fig . 12. - Forces acting on a Small Magnet when placed in the field of a larger one . the ...
Page 87
... scale as used with a mirror galvanometer . It is convenient to add to the galvano- meter a short vertical brass wire stuck in one cheek . On this wire is made to slide a cork , traversed by a short length of magnetised knitting needle ...
... scale as used with a mirror galvanometer . It is convenient to add to the galvano- meter a short vertical brass wire stuck in one cheek . On this wire is made to slide a cork , traversed by a short length of magnetised knitting needle ...
Page 106
... scale called the Standard Wire Gauge ( S.W.G. ) , or the Birmingham Wire Gauge ( B.W.G. ) , but the sizes for very accurate work are best stated in mils , one mil being the one - thousandth part of an inch . The following tables ( p ...
... scale called the Standard Wire Gauge ( S.W.G. ) , or the Birmingham Wire Gauge ( B.W.G. ) , but the sizes for very accurate work are best stated in mils , one mil being the one - thousandth part of an inch . The following tables ( p ...
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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.
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