Question

The transmitted power in a transmission line, when the reflection coefficient and the incident power are 0.6 and 24V respectively, is

(a) 15.36

(b) 51.63

(c) 15.63

(d) 51.36

I got this question during an interview.

My question is from Reflection and Transmission Coefficients topic in portion Transmission Lines of Electromagnetic Theory

Answer 1

Correct answer is (a) 15.36

For explanation: The transmitted power in terms of the reflection coefficient and the incident power is Ptr = (1-R^2)Pinc, where R = 0.6 and Pinc = 24, from the given data. Thus Ptr = (1- 0.6^2) x 24 = 15.36 units.