Question

Find the load impedance in a quarter line transformer with characteristic impedance of 75 ohm and input impedance of 200 ohm. (a) 28.125 (b) 12.285 (c) 52.185 (d) 85.128 The question was posed to me during an interview. This intriguing question comes from Transmission Line Equations topic in division Transmission Lines of Electromagnetic Theory Select the correct answer from above options Electromagnetic Theory questions and answers, Electromagnetic Theory questions pdf, Electromagnetic Theory question bank, Electromagnetic Theory questions and answers pdf, mcq on Electromagnetic Theory pdf,electromagnetic theory book pdf,electromagnetic theory pdf notes,electromagnetic theory lecture notes,electromagnetic theory of light,maxwell electromagnetic theory,electromagnetic theory proposed by,electromagnetic theory engineering physics,electromagnetic theory nptel

Answer 1

The correct option is (a) 28.125 The explanation is: For a quarter line wave, the characteristic impedance is the geometric mean of input and load impedances. Thus Zo^2 = Zin ZL. On substituting for Zo = 75 and Zin = 200, we get ZL = Zo^2/Zin = 75^2/200 = 28.125 ohm.