Question

A transmission line of real characteristic impedance is terminated with an unknown load. The measured value of VSWR on the line is equal to 2 and a voltage minimum point is found to be at the load. The load impedance is then

Answer 1

Ans : (c)

Given, voltage minimum ($v_{min}$) point is at load.

If $v_{min}$ or $v_{max}$ occurs at the load for a lossless transmission line then load impedance $Z_L$ is purely resistive.

If $Z_L$ (resistive) > $Z_0$, voltage maxima occurs at the load.

If $Z_L$ (resisitive) < $Z_0$, voltage minima occurs at the load.