Mathematical and Physical Science Volume 80 ebook
Mathematical and Physical Science Volume 80 ebook
Mathematical and Physical Science Volume 80 by Royal Society
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Author: Royal Society
Page Count: 226 pages
Published Date: 06 Aug 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130123180
File size: 29 Mb
File Name: Mathematical.and.Physical.Science.Volume.80.pdf
Download Link: Mathematical and Physical Science Volume 80
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 edition. Excerpt: ... series for the other. It was thus possible to calculate the approximate value of the inductance of the moving coil for different values of 6, and to show that the values of L, and of dL/dO, were too smalLto affect the accuracy of the instruments actually constructed. In some cases the value of Lp was measured directly. This was not a simple matter. It was necessary to use an alternate current method. It was useless to attempt to compare the impedance of the coil with its resistance, for these two quantities only differed by about one part in 5000, since the reactance was only about 2 per cent, of the resistance. A bridge method was actually used, the coil to be tested forming one arm, the other three consisting of non-inductive resistances, two of which measured about 1000 ohms each. All the resistances were suitable for, and were used with, currents of about 0'1 ampere. A pressure of 100 volts, alternating at a frequency of 50, was applied to the bridge. The cross conductor was arranged to have a resistance of about 200 ohms to reduce shunting errors, and contained an instrument capable of measuring pressures as low as 00002 volt applied to this conductor. So far as I am aware, no instrument for alternating currents is obtainable which is at all suitable for such a measurement. The voltage was measured after rectification by a suitable commutator, with the aid of a delicate galvanometer. To measure the minimum cross voltage it was necessary to make an extremely fine adjustment of the bridge. This was obtained by means of a sliding contact on a potentiometer wire 2 metres long and of about 9 ohms resistance. The minimum cross voltage, divided by the current through the coil under test, gave the reactance Lp of this coil. An instrument of the...
Read online Mathematical and Physical Science Volume 80 Buy and read online Mathematical and Physical Science Volume 80 Download Mathematical and Physical Science Volume 80 for pc, mac, kindle, readers Download to iPad/iPhone/iOS, B&N nook Mathematical and Physical Science Volume 80 ebook, pdf, djvu, epub, mobi, fb2, zip, rar, torrent
Present-Day Europe : Its Natural States of Mind (1917) epub
Suite Du Supplement Au Nobiliaire Des Pays-Bas, Et Du Comte de Bourgogne (1779) download
Mathematical and Physical Science Volume 80 by Royal Society
Author: Royal Society
Page Count: 226 pages
Published Date: 06 Aug 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130123180
File size: 29 Mb
File Name: Mathematical.and.Physical.Science.Volume.80.pdf
Download Link: Mathematical and Physical Science Volume 80
---------------------------------------------------------------
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 edition. Excerpt: ... series for the other. It was thus possible to calculate the approximate value of the inductance of the moving coil for different values of 6, and to show that the values of L, and of dL/dO, were too smalLto affect the accuracy of the instruments actually constructed. In some cases the value of Lp was measured directly. This was not a simple matter. It was necessary to use an alternate current method. It was useless to attempt to compare the impedance of the coil with its resistance, for these two quantities only differed by about one part in 5000, since the reactance was only about 2 per cent, of the resistance. A bridge method was actually used, the coil to be tested forming one arm, the other three consisting of non-inductive resistances, two of which measured about 1000 ohms each. All the resistances were suitable for, and were used with, currents of about 0'1 ampere. A pressure of 100 volts, alternating at a frequency of 50, was applied to the bridge. The cross conductor was arranged to have a resistance of about 200 ohms to reduce shunting errors, and contained an instrument capable of measuring pressures as low as 00002 volt applied to this conductor. So far as I am aware, no instrument for alternating currents is obtainable which is at all suitable for such a measurement. The voltage was measured after rectification by a suitable commutator, with the aid of a delicate galvanometer. To measure the minimum cross voltage it was necessary to make an extremely fine adjustment of the bridge. This was obtained by means of a sliding contact on a potentiometer wire 2 metres long and of about 9 ohms resistance. The minimum cross voltage, divided by the current through the coil under test, gave the reactance Lp of this coil. An instrument of the...
Read online Mathematical and Physical Science Volume 80 Buy and read online Mathematical and Physical Science Volume 80 Download Mathematical and Physical Science Volume 80 for pc, mac, kindle, readers Download to iPad/iPhone/iOS, B&N nook Mathematical and Physical Science Volume 80 ebook, pdf, djvu, epub, mobi, fb2, zip, rar, torrent
Present-Day Europe : Its Natural States of Mind (1917) epub
Suite Du Supplement Au Nobiliaire Des Pays-Bas, Et Du Comte de Bourgogne (1779) download