Experimental Study on the Natural Wave Length

Abstract

The present paper is the report of the experimental results on the natural oscillation wave length of the various kinds of pancake coils wound on square frames.
It may be concluded, from our experiment, that the ratio of the natural wave length (λ0) to the total length of wire (l) is nearly determined only by the ratio of the winding (h) to the mean diameter 2r) of the col.
From the measured value of natural wave length and the self inductance at audio frequencies, the equivalent self capacity (C0) was calculated.
The natural wave length was measured under three different conditions, viz., (i) both end insulated, (ii) outer end earthed and (iii) inner end earthed, and the results are shown in curv s (I)(II).