Elementary Lessons in Electricity & MagnetismMacmillan and Company, 1886 - 456 σελίδες |
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Σελίδα 41
... rotate ; with this he discovered the existence of electric sparks and the repulsion of similarly electrified bodies . Sir Isaac Newton replaced Von Guericke's globe of sulphur by a globe of glass . A little later the form of the machine ...
... rotate ; with this he discovered the existence of electric sparks and the repulsion of similarly electrified bodies . Sir Isaac Newton replaced Von Guericke's globe of sulphur by a globe of glass . A little later the form of the machine ...
Σελίδα 50
... rotation . Similar instruments have been contrived by Varley , Sir W. Thomson ( the " replenisher " ) , Töpler ... rotated at a high speed by a band and driving pulley . There are two holes or windows , P and P ' , cut at opposite points ...
... rotation . Similar instruments have been contrived by Varley , Sir W. Thomson ( the " replenisher " ) , Töpler ... rotated at a high speed by a band and driving pulley . There are two holes or windows , P and P ' , cut at opposite points ...
Σελίδα 51
... rotated ; pose a small A B Fig . 29 . and it is found that after a few turns the exertion required to keep up the ro- tation increases greatly at the same moment pale - blue brushes of light are seen to issue from the points , and , on ...
... rotated ; pose a small A B Fig . 29 . and it is found that after a few turns the exertion required to keep up the ro- tation increases greatly at the same moment pale - blue brushes of light are seen to issue from the points , and , on ...
Σελίδα 52
... rotating disc positively , the lower one charging the lower portion of the disc negatively . The back of the rotating disc is at the same time similarly charged ; and the charges carried round on the back surface serve to increase the ...
... rotating disc positively , the lower one charging the lower portion of the disc negatively . The back of the rotating disc is at the same time similarly charged ; and the charges carried round on the back surface serve to increase the ...
Σελίδα 53
... rotation . It was found that the electromotive force of a machine was equal to that of 52,000 Daniell's cells , or ... rotating plate , these buttons being lightly touched , while rotating , by small metal brushes fixed upon the combs ...
... rotation . It was found that the electromotive force of a machine was equal to that of 52,000 Daniell's cells , or ... rotating plate , these buttons being lightly touched , while rotating , by small metal brushes fixed upon the combs ...
Άλλες εκδόσεις - Προβολή όλων
ELEM LESSONS IN ELECTRICITY & Silvanus Phillips 1851-1916 Thompson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
ELEM LESSONS IN ELECTRICITY & Silvanus Phillips 1851-1916 Thompson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
ELEM LESSONS IN ELECTRICITY & Silvanus Phillips 1851-1916 Thompson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
action ampères angle armature attracted ball battery bismuth carbon centimetres charge of electricity chemical circuit coil condenser conductor copper current flows Daniell's cells deflection diamagnetic dielectric difference of potential direction disc discharge distance earth earth's magnetism electric force electrified electrified body electrolytic electromagnet electrometer electromotive-force electroscope electrostatic equal Faraday galvanometer gramme heat Hence hydrogen instrument insulated internal resistance inverse iron kathode length Lesson Leyden jar light lines of force liquid magnetic field magnetic force magnetic pole magnetic potential magnetic shell magnetised measured metal move negative number of lines-of-force observed Ohm's law ohms oxygen pass piece placed plate platinum polarisation positive produced proportional quantity of electricity repelled repulsion rotation round rubbed shown in Fig spark sphere steel strength substances sulphuric acid surface tangent tangent galvanometer temperature torsion balance tube turns unit of electricity vibrations voltaic volts zinc
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Σελίδα 52 - These are admirable books, because they are constructed on a principle, and that the simplest principle on which it is possible to learn to read English.
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