Question

Given that R = 20 ohm, L = 40 mH, C = 40 μF, G = 0.02 mho. Find whether the line is distortionless or not.

(a) Distorted line

(b) Distortionless line

(c) All of the mentioned

(d) None of the mentioned

I have been asked this question during a job interview.

This key question is from Lossless and Distortionless Line topic in division Transmission Lines of Electromagnetic Theory

Answer 1

Correct choice is (b) Distortionless line

The explanation is: For a distortionless line, the condition R/L = G/C must be true. On substituting for R = 20, L = 40 mH, C = 40 μF, G = 0.02, we get R/L = 500 and G/C = 500. Thus the line is distortionless.