Question

(Pre-Lab) Which of these systems needs to be treated as a transmission line system and why? Justify your answer quantitatively. Indicate any assumptions that you are making.

(a) Integrated circuit at high frequencies (500 MHz - 1 GHz)

(b) Electrical lines running through your house

(c) Electrical lines connecting cities separated by hundreds of kilometers

(d) VHF antenna that leads from a rabbit ear antenna to your television

 

Answer 1

For this question the answer is (C) Electrical lines connecting cities separated by hundreds of kilometers

1) first we know, if other answer are not Correct :(a)integrated circuit at high frequency(500MHz- 1GHz) is not correct answer because for IC (integrated circuit) operating frequency is given so it is not correct, Next (b)Electrical lines running through your house is not correct because the line running in the house is low voltage and that are Distribution line so this also not correct answer and next (d) VHF antenna that leads from a rabbit ear antenna to your television this also not correct answer because this is not a transmission line system here the the transmission is through air not through transmission line so this also not correct answer.

2) The correct answer for question is (c) Electrical lines connecting cities separated by hundreds of kilometers because the transmission line is used for transmitting the power to long distance for hundreds of kilometers and it this transmission power is not given to the customers the only purpose of this line is used to transmission of power.

3) Normally this transmission line are connect the power generating station to substation near to the cities and the rating of this transmission line is 440kV,220kV,110kV,66kV and 33kV etc.