Question

Find the power reflected in a transmission line, when the reflection coefficient and input power are 0.45 and 18V respectively. (a) 3.645 (b) 6.453 (c) 4.563 (d) 5.463 I have been asked this question during an online interview. This question is from Reflection and Transmission Coefficients topic in chapter 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

Correct choice is (a) 3.645 Explanation: The ratio of the reflected to incident amplitudes gives the reflection. Similarly, the ratio of reflected to incident power gives square of the reflection coefficient. Thus Prefl = R^2Pinc. On substituting for R = 0.45 and Pinc = 18, we get Prefl = 0.45^2 x 18 = 3.645 units.