Question
What are the two families of circles and arcs that make up a Smith chart?
Answer Options
- A) Inductance and capacitance
- B) Reactance and voltage
- C) Resistance and reactance
- D) Voltage and impedance
Correct Answer: C
Explanation
The Smith Chart is a graphical plot of the complex impedance plane, which includes the resistive and reactive components of the load impedance (Z = R + jX). The chart’s unique layout is constructed entirely from two distinct families of circular lines that define the coordinate system.
The two families of circles and arcs that make up a Smith chart are the Resistance and reactance lines. The circles of constant resistance (concentric about the horizontal axis) and the arcs of constant reactance (sweeping across the chart) allow the plotting and manipulation of any complex impedance R + jX.
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