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The input impedance of a quarter wave line 50 ohm and load impedance of 20 ohm is

The input impedance of a quarter wave line 50 ohm and load impedance of 20 ohm is Correct Answer 125

The characteristic impedance will be the geometric mean of the input impedance and the load impedance. Thus Zo2 = Zin ZL. On substituting for Zo = 50 and ZL = 20, we get the input impedance as 502/20 = 125 ohm.

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