Difficulty: Easy
Correct Answer: semi-log
Explanation:
Introduction / Context:
Bode plots are frequency-response tools widely used in control and electronics. They present magnitude and phase as functions of frequency. Understanding the axes scales is essential to interpret slope rules, corner frequencies, and asymptotes correctly.
Given Data / Assumptions:
Concept / Approach:
The Bode magnitude plot uses a logarithmic frequency axis and a linear magnitude axis (often in dB). This corresponds to a semi-log graph (log scale on the x-axis, linear scale on the y-axis). The log frequency axis spreads decades evenly and simplifies reading of slopes and breakpoints.
Step-by-Step Solution:
Verification / Alternative check:
Textbooks depict Bode magnitude on semi-log grids; phase plots also use the same log frequency axis with linear phase on the vertical axis.
Why Other Options Are Wrong:
Common Pitfalls:
Confusing “log–log” with “semi-log.” Remember: Bode uses a log scale only on the frequency axis.
Final Answer:
semi-log
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