GATE 2018 EC – Question 20
The points $P$, $Q$, and $R$ shown on the Smith chart (normalized impedance chart) in the following figure represent:
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Correct answer: (C) P: Short Circuit, Q: Matched Load, R: Open Circuit
Explanation
On the Smith chart, the left end of the real axis ($z=0$, $\Gamma=-1$) is a short circuit, the centre ($z=1$, $\Gamma=0$) is the matched load and the right end ($z=\infty$, $\Gamma=+1$) is an open circuit. So P is a short circuit, Q is matched and R is an open circuit.