Question

A lossless line having 50 ohm characteristic impedance and length wavelength/4 is short circuited at one end connected to an ideal voltage source of 1V at the other end. The current drawn from the voltage sources is (a) 0 (b) 0.02 (c) Infinity (d) 50 This question was addressed to me in an interview. This question is from Advanced and Tricky Questions in chapter Advanced and Tricky Questions 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) 0 The best I can explain: For a quarter wave transformer, the input impedance is given by Zin = Z0^2/ZL. The load impedance will be zero in case of short circuit. Thus the input impedance will be infinite. The current drawn is I = V/ZL = 1/∞ = 0.