Electrical Engineering`

This makes no sense.

Transposition is a change in the order of a sequence. It is often done in a mathematical analysis to either put things in a standard form for other analysis or to have matching phenomena cancel each other so that the formula can be simplified. While this is not the only way the term transposition is used in electrical engineering, I do not understand how you are using it here with a transmission line.

This question should be in the Electrical Engineering Section and not in Engineering Careers. That said, check here.