Sinusoidal Variation of a Parameter in a Simple Series Circuit

A large amount of work has been done by others in analyzing the equivalent of a varying-parameter circuit on the assumption that L or C varies as 1/(1+k cos ωst). In this paper a brief comparison of these results is made with results obtained on the apparently more direct assumption that L or C varies as (1+k cos ωst) with k sufficiently large for the two cases to yield appreciably different results. An indication of how previous analyses can be applied to the present case, and some data concerning that case are given.