Arc Oscillations in Coupled Circuits

1. When a secondary circuit is closely coupled, its reaction causes variation in the primary oscillations and consequently in the secondary oscillations themselves. 2. The cyclic current diagrams afford a means of studying the variation of current with time, which cannot be easily done by the dynamic characteristics. 3. There are favorable conditions for maximum current effect in the secondary. They depend on the ratio of the frequency of the separate discharges to that of the secondary oscillation. 4. A spark creates more powerful oscillations than an arc of the same current strength, tho the former are not quite as steady, owing to the necessarily higher discharge potential. The above principles are fully illustrated by a number of experimentally obtained dynamic characteristics and cyclic current diagrams.