Question 73. . A lossless transmission line with Zo = 300 f is excited with a 100 MHz signal. The line is 50 cm long and is terminated in a resistance of 300 f at the load end. If the velocity factor for the line is 2/3, the source impedance for maximum power transfer from source to the line will be
Answer: Option B. -> dividing the load resistance by characteristic impedance of the line
Question 76. . One of the following statements is wrong
When a given transmission line is terminated in its characteristic impedance, its input impedance is always equal to the characteristic impedance irrespective of the length of the line in terms of wavelength
When a transmission line is terminated in an impedance other than the characteristic impedance, its input impedance varies with length for a givensignal frequency or with frequency for a given length
The characteristic impedance of a lossless line is resistive
The propagation velocity on the transmission line is inversely proportional to the permittivity of the dielectric used
