Question

The characteristic impedance of a line having open and short impedances of 20 and 5 respectively is (a) 20 (b) 100 (c) 25 (d) 10 The question was asked in my homework. This is a very interesting question from Transmission Lines 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 (d) 10 The explanation: The characteristic impedance is the geometric mean of the short and open circuit impedance. It is given by Zo^2 = Zsc Zoc. On substituting Zoc = 20 and Zsc = 5, we get Zo^2 = 20 X 5 = 100. Thus Zo = 10 ohm.