Testing Dynamos

John William Strutt

doi:10.1017/CBO9780511703973.056

ART. 133 - Testing Dynamos

Published online by Cambridge University Press: 05 December 2011

John William Strutt

Book contents

Frontmatter
PREFACE
Contents
ART. 79 On the Determination of the Ohm [B. A. Unit] in Absolute Measure
ART. 80 Experiments to Determine the Value of the British Association Unit of Resistance in Absolute Measure
ART. 81 On the Specific Resistance of Mercury
ART. 82 The Use of Telescopes on Dark Nights
ART. 83 On a New Form of Gas Battery
ART. 84 Acoustical Observations. IV
ART. 85 Further Observations upon Liquid Jets, in Continuation of those recorded in the Royal Society's ‘Proceedings’ for March and May, 1879
ART. 86 Address to the Mathematical and Physical Science Section of the British Association
ART. 87 On the Tension of Mercury Vapour at Common Temperatures
ART. 88 On the Absolute Measurement of Electric Currents
ART. 89 On the Duration of Free Electric Currents in an Infinite Conducting Cylinder
ART. 90 On the Equilibrium of Liquid Conducting Masses charged with Electricity
ART. 91 On an Instrument capable of Measuring the Intensity of Aerial Vibrations
ART. 92 Comparison of Methods for the Determination of Resistances in Absolute Measure
ART. 93 On the Dark Plane which is formed over a Heated Wire in Dusty Air
ART. 94 Experiments, by the Method of Lorenz, for the Further Determination of the Absolute Value of the British Association Unit of Resistance, with an Appendix on the Determination of the Pitch of a Standard Tuning-Fork
ART. 95 On the Mean Radius of Coils of Insulated Wire
ART. 96 On the Invisibility of Small Objects in a Bad Light
ART. 97 On Maintained Vibrations
ART. 98 The Soaring of Birds
ART. 99 Distribution of Energy in the Spectrum
ART. 100 Investigation of the Character of the Equilibrium of an Incompressible Heavy Fluid of Variable Density
ART. 101 On the Vibrations of a Cylindrical Vessel containing Liquid
ART. 102 On the Crispations of Fluid resting upon a Vibrating Support
ART. 103 On Porous Bodies in Relation to Sound
ART. 104 Suggestions for Facilitating the Use of a Delicate Balance
ART. 105 On the Imperfection of the Galvanometer as a Test of the Evanescence of a Transient Current
ART. 106 On Laplace's Theory of Capillarity
ART. 107 On the Measurement of Electric Currents
ART. 108 On the Circulation of Air observed in Kundt's Tubes, and on some Allied Acoustical Problems
ART. 109 The form of Standing Waves on the Surface of Running Water
ART. 110 Acoustical Observations.—V
ART. 111 On the Measurement of the Electrical Resistance between Two Neighbouring Points on a Conductor
ART. 112 On the Electro-Chemical Equivalent of Silver, and on the Absolute Electromotive Force of Clark Cells
ART. 113 Presidential Address
ART. 114 A Lecture Experiment on Induction
ART. 115 On Telephoning through a Cable
ART. 116 On a Galvanometer with Twenty Wires
ART. 117 On Clark's Standard Cells
ART. 118 On the Constant of Magnetic Rotation of Light in Bisulphide of Carbon
ART. 119 Optics
ART. 120 Über die Methode der Dämpfung bei der Bestimmung des Ohms
ART. 121 On the Theory of Illumination in a Fog
ART. 122 A Monochromatic Telescope, with application to Photometry
ART. 123 Self-induction in Relation to Certain Experiments of Mr Willoughby Smith and to the Determination of the Ohm
ART. 124 Professor Tait's “Properties of Matter”
ART. 125 A Theorem relating to the Time-Moduli of Dissipative Systems
ART. 126 On the Accuracy of Focus necessary for Sensibly Perfect Definition
ART. 127 On an Improved Apparatus for Christiansen's Experiment
ART. 128 Optical Comparison of Methods for Observing Small Rotations
ART. 129 On the Thermodynamic Efficiency of the Thermopile
ART. 130 On Waves propagated along the Plane Surface of an Elastic Solid
ART. 131 On Prof. Himstedt's Determination of the Ohm
ART. 132 On the Clark Cell as a Standard of Electro-motive Force
ART. 133 Testing Dynamos
ART. 134 The Reaction upon the Driving-Point of a System executing Forced Harmonic Oscillations of Various Periods, with Applications to Electricity
ART. 135 On the Self-Induction and Resistance of Straight Conductors
ART. 136 On the Colours of Thin Plates
ART. 137 Notes, chiefly Historical, on some Fundamental Propositions in Optics
ART. 138 On the Intensity of Light Reflected from Certain Surfaces at Nearly Perpendicular Incidence
ART. 139 Notes on Electricity and Magnetism. I. On the Energy of Magnetized Iron
ART. 140 Notes on Electricity and Magnetism. II. The Self-Induction and Resistance of Compound Conductors
ART. 141 Notes on Electricity and Magnetism.—III. On the Behaviour of Iron and Steel under the Operation of Feeble Magnetic Forces

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Summary

In the measurements of the efficiency of dynamos by Dr Hopkinson's ingenious method, would it not be possible to carry out the principle more fully, so as to dispense with all measurement of mechanical power, by introducing into the circuit a few storage cells which should supply the small percentage of energy wanted? In this way all the data could be observed electrically.

Type: Chapter
Information: Scientific Papers , pp. 474

DOI: https://doi.org/10.1017/CBO9780511703973.056 [Opens in a new window]

Publisher: Cambridge University Press

Print publication year: 2009

First published in: 1900

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ART. 133 - Testing Dynamos

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