[ purpose | theory I | procedure | questions ]
(II) For a series circuit (Fig. 2) containing R, L, and C, to which an AC emf is applied, the current
(3)
where . The impedance in this case, and again the amplitude of the current is . The current has its maximum amplitude Im when or . The resonant frequency of this circuit is .
[ purpose | theory I | theory II | procedure | questions ]