. Theory and calculation of alternating current phenomena . T PHENOMENA electric circuit, as would be the case in the absence of the glassplates but it would merely be the capacity current of the glassplates; and it would not be followed by the arc, but passes as auniform bluish glow discharge, or as pink streamers—corona. 125. If the dielectric field is not uniform, but varying in densityas, for instance, the field between two spheres or the field betweentwo parallel wires, then with increasing voltage the breakdowngradient will not be reached simultaneously throughout the en-tire field, as i
. Theory and calculation of alternating current phenomena . T PHENOMENA electric circuit, as would be the case in the absence of the glassplates but it would merely be the capacity current of the glassplates; and it would not be followed by the arc, but passes as auniform bluish glow discharge, or as pink streamers—corona. 125. If the dielectric field is not uniform, but varying in densityas, for instance, the field between two spheres or the field betweentwo parallel wires, then with increasing voltage the breakdowngradient will not be reached simultaneously throughout the en-tire field, as in a uniform field, but it is first reached in the denserportion of the field—at the surface of the spheres or parallel wires,where the lines of dielectric force converge. Thus the dielectricwill first break down at the denser portion of the field, and short-circuit these portions by the flow of dynamic current. This,however, changes the voltage gradient in the rest of the field,and may raise it so as to break down the entire field, or it may notdo
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