On variations in the conductivity of air enclosed in metallic receivers by Charles S. Wright

Cover of: On variations in the conductivity of air enclosed in metallic receivers | Charles S. Wright

Published by Royal Society of Canada in Ottawa .

Written in English

Read online

Subjects:

  • Ionization of gases.

Edition Notes

Issued as reprint in covers of the University of Toronto studies. Papers from the physical laboratories. No.28.

Book details

Statementby C.S. Wright, B.A. Communicated by Professor J.C. McLennan.
SeriesBulletin of the Royal Society of Canada,, No. 8, 1908
Classifications
LC ClassificationsQC1 .T66 no. 28
The Physical Object
Pagination1 p. l., p. <85>-109.
Number of Pages109
ID Numbers
Open LibraryOL7013157M
LC Control Number09029155
OCLC/WorldCa26845908

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What we can learn from measurements of air electric conductivity in Rn‐rich atmosphere E. Seran1, M. Godefroy1, E. Pili2, enclosed space on the efficiency of gas ionization. Introduction electric conductivity independently of the external electric field and its by: 5.

Coaxial cable, or coax (pronounced / ˈ k oʊ. æ k s /) is a type of electrical cable consisting of an inner conductor surrounded by a concentric conducting shield, with the two separated by a dielectric (insulating material); many coaxial cables also have a protective outer sheath or jacket.

The term "coaxial" refers to the inner conductor and the outer shield sharing a geometric axis. The electrical conductivity of air within sealed rooms has been found to increase regularly, with some fluctuations superimposed, towards a limiting value.

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The coherer was a primitive form of radio signal detector used in the first radio receivers during the wireless telegraphy era at the beginning of the 20th century. Its use in radio was based on the findings of French physicist Edouard Branly and adapted by other physicists and inventors over the next ten years.

The device consists of a tube or capsule containing two electrodes spaced a. The electrical conductivity(the ability of a substance to conduct an electric current) is the inverse of the resistivity: σ= 1/ρ Since the electric field intensityin the material is E = V/l, Ohm's law can be rewritten in terms of the current densityJ = I/A as: J = σE Electrical conductivity varies between different materialsFile Size: KB.

This view is further supported by the fact that in working with self-recovering receivers of various types, both positive and negative, I have not only found that for each intensity of radiation there is a corresponding conductivity variation, but that under the continued action of radiation, the conductivity variation attains a maximum value.

(Problem in the Book) Circular copper rods of diameter D = 1 mm and length L= 25 mm are used to enhance heat transfer from a surface that is maintained at 𝑇,1 = C. One end of the rod is attached to this surface (at x = 0), while the other end (x = 25 mm) is joined to a second surface, which is maintained at 𝑇,2= 0 o C.

Air isFile Size: KB. Electrical processes in air often lead to the formation of a plasma, a mixture of air and some foreign element (e.g., in the case of an electric discharge the material of the electrode). The presence of an impurity can appreciably affect the electrical conductivity of the air (and, accordingly, the parameters of the effect investigated) for the following by: 1.

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The sparking coil and battery are enclosed in a small double-walled metallic box with a tube for the passage of the electric beam. Magnetic disturbance due to the make and break of the sparking coil, was found to affect the receiver; the magnetic disturbance was eliminated by making the inner box of soft iron which acted as a magnetic screen.

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Full text of "Ions, electrons, and ionizing radiations" See other formats. In the limit of infinitesimal thickness dx, with temperature difference dT, this becomes H = -kA(dT/dx), where H (= dQ/dt) is the time rate of heat flow through the area A, dT/dx is the temperature gradient across the material, and k, the proportionality constant, is the thermal conductivity of the material.

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Cepellotti and Marzari propose a new set of modes called relaxons, which are superpositions of phonons; for simplicity, only one relaxon mode is illustrated at the center of the : Alan McGaughey.

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(b) The heater electrical power requirement as a function of the exterior air temperature for different exterior convection coefficients is shown in the plot. When ho = 2 W/m 2⋅K, the heater is unecessary, since the glass is maintained at 15°C by the interior air.

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