It was gloomy and ill-lighted by the uncertain, even though dazzling, glow of one or two electric arc lights.
Why are the shadows caused by an electric arc lamp so sharply defined?
When an electric arc passes between certain metals like iron and copper a small bead is raised on their surfaces.
The exact temperature of the electric arc is not known with certainty.
Unfortunately, however, the fuse is almost no protection against an electric arc.
In one of these volumes is found an account of a lecture-experiment by Davy which certainly is a description of the electric arc.
The greatest heat that has yet been produced artificially is that of the electric arc.
In 1848 the first electric arc lamp used for general lighting was installed in Paris.
Curiously enough, this new rival, acetylene gas, had been brought into existence commercially by the electric arc itself.
Indeed, the sun is nearly four times brighter than the "crater," or brightest part of the electric arc.
|electric arc |
An electric current, often strong, brief, and luminous, in which electrons jump across a gap. Electric arcs across specially designed electrodes can produce very high heats and bright light, and are used for such purposes as welding and illumination in spotlights. Unwanted arcs in electrical circuits can cause fires. Lightning is a case of an electric arc between one cloud and the earth or another cloud, as are sparks caused by discharges of static electricity.