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If a 100 Hz signal is fed to the horizontal input of an oscilloscope and a 150 Hz signal is fed to the vertical input, what type of pattern should be displayed on the screen?
A looping pattern with 3 horizontal loops, and 2 vertical loops
This describes a Lissajous figure. The ratio of frequencies (Fy/Fx = 150/100 = 3/2) determines the number of horizontal tangencies (numerator, 3 loops) and vertical tangencies (denominator, 2 loops).
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