A . 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
B . 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
C . The characteristic impedance of a lossless line is resistive
D . The propagation velocity on the transmission line is inversely proportional to the permittivity of the dielectric used
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