The imaginary part of this quantity is called the reactance and is directly proportional to the frequency for an inductor.
Pierce used one definition of this quantity to derive the electron optical equation in the paraxial approximation. Jacobi's law dictates that this quantity for one part of a system must be the complex conjugate to that in the other part in order to maximize power transfer. The independent variable in the Smith chart, this variable has a form given by the square root of the ratio of induction density to capacitance density for a transmission line, which will exhibit reflection unless this quantity is matched by its terminator. The imaginary part of this quantity is called the reactance and is directly proportional to the frequency for an inductor. For 10 points, name this quantity that is the complex ratio of voltage to current.
Pierce used one definition of this quantity to derive the electron optical equation in the paraxial approximation.
impedance [prompt on Z]