GRE question: oscilloscope with two oscillators

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Homework Help Overview

The problem involves analyzing the output of an oscilloscope when two oscillators are used, focusing on the resulting waveforms displayed on the x and y axes. The context suggests a study of wave interactions and their graphical representations.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to understand why a specific answer is considered correct, questioning the relationship between the frequencies and amplitudes of the signals. Other participants inquire about the relative frequencies in the proposed answer options, indicating uncertainty in their understanding.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem. Some guidance is being sought regarding the reasoning behind the answer choices, but no consensus has been reached yet.

Contextual Notes

Participants are working with limited information about the specific frequencies and amplitudes involved in the problem, which may affect their reasoning and conclusions.

Silviu
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Homework Statement


Hello! The problem is the one I attached.

Homework Equations

The Attempt at a Solution


They say the answer is A, but I am not sure why. From what I remember from lab class, when you put 2 signals on x and y-axis you get usually a closed loop, like D or E. I think D happens when you have the same frequency but different amplitudes so I assumed the answer is E. Can someone explain why is it A?

Thank you.
 

Attachments

  • GRE.png
    GRE.png
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In E, what would be the relative frequencies along X and Y?
 
DrClaude said:
In E, what would be the relative frequencies along X and Y?
Oh, I am not sure. I picked that just by elimination...
 
How did you eliminate the others then?
 

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