Which among the following statements is/are precise in accordance to distortionless line?

 A. A lossless line is also a distortionless line

B. A distortionless line is not necessarily a lossless line

a. A is true & B is false

b. A is false & Bis true

c. Both A & B are true

d. Both A & B are false

ANSWER: Both A & B are true

Explanation:

The conductors in the lossless line are perfect and the dielectric medium that separates them is absolutely lossless.

Besides this, a transmission line where the value of an attenuation constant is independent of frequency & phase constant is linearly dependent on frequency.

Hence, it is obvious that a lossless line can also be a distortionless line but a distortionless line cannot be essentially a lossless line.