Question

For maximum power transfer theorem to be applied to the transmission line, the reflection coefficient has to be

(a) 1

(b) -1

(c) 0

(d) ∞

I got this question in an international level competition.

This intriguing question comes from Transmission Lines in division Transmission Lines of Electromagnetic Theory

Answer 1

Correct choice is (c) 0

To explain: Maximum power transfer between the load and source is possible, only when both are matched. This will lead to no reflections. Thus the reflection coefficient will be zero.