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An oscillographic study of arcs formed between silver contacts in the rupturing of 120‐volt a.c. circuits containing resistive loads shows that reignition of the arc occurs at low speeds of contact separation. Data have been obtained by means of a ballistic wattmeter showing the effect of...
It is shown that the velocities of plastic deformation, deduced from previous experimental data on lead cylinders, are in satisfactory accord with the relation v = a exp ( b P ) , where a and b are constants, and P is the prevailing pressure. Integration of this equation leads to the following...
The gradient E , total voltage e , and current density I in the one‐atmosphere hydrogen arc between pure carbon electrodes in the 0–10‐ampere range are measured by an oscillographic method. An abrupt change in e takes place at 2 and 0.6 ampere, and in E at 2 amperes, leading to the...
The known photographs of an unusual type of discharge occurring in intense thunderstorm fields principally near ground objects are described and discussed. A possible explanation of the discharges is suggested.
The general solution of the field distribution produced by a point charge at rest in the axis of a metallic cylinder is derived, and a simple approximation is given for the field strength on the surface of the cylinder.
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