Power loss in a transmission line

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Homework Help Overview

The discussion revolves around power loss in a transmission line, specifically addressing issues related to input and output power discrepancies. The subject area includes electrical engineering concepts, particularly focusing on transmission line parameters and network analysis.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • The original poster expresses confusion regarding the output power being higher than the input power and seeks assistance with a specific part of their solution. Some participants question the meaning of parameters A, B, C, and D, wondering if they relate to a diagram or standard notation. Others suggest that these parameters may refer to the ABCD-Parameters for a two-port network.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem and providing guidance on how to clarify the notation used. There is an emphasis on ensuring clear communication of mathematical expressions, as some participants note difficulties in understanding handwritten content.

Contextual Notes

There is mention of potential issues with the clarity of written content, which may affect the discussion. The original poster's request for help is focused on a specific part of their solution, indicating that they may have already attempted other sections of the problem.

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Homework Statement


upload_2018-12-3_22-24-41.png


Homework Equations

The Attempt at a Solution


upload_2018-12-3_22-25-13.png


I have posted the whole solution so it is more complete, but I really only need help with part c (I think)

My output power is higher than my input power, I'm not sure where I'm going wrong
 

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I have no idea what the information regarding A, B, C and D means. Do they refer to a diagram or is this some standard notation for such problems?
 
haruspex said:
I have no idea what the information regarding A, B, C and D means. Do they refer to a diagram or is this some standard notation for such problems?
I believe they refer to the ABCD-Parameters for a two port network:
upload_2018-12-4_14-38-15.png
 

Attachments

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I'm sorry but I can't make out your writing. You should type everything in unless you have particularly large and clear writing. You don't have to learn latex necessarily; click on the summation sign (upper case sigma) for lots of symbols.

You can solve for V1/I1 and V2/V1 with I2 = 0 in the post 3 equations to get all the answers.
.
 
rude man said:
unless you have particularly large and clear writing.
Even then, it is hard making comments on lines of algebra in the middle of images (unless the equations are numbered in the image).
 

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