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Which of the following Lissajous patterns is obtained when frequency ratio between the two signals at x and y input of CRO is 1 and phase difference between them is 45°?

Which of the following Lissajous patterns is obtained when frequency ratio between the two signals at x and y input of CRO is 1 and phase difference between them is 45°? Correct Answer <img alt="F1 U.B Deepak 28.01.2020 D 30" src="//storage.googleapis.com/tb-img/production/20/05/F1_U.B_Deepak_28.01.2020_D%2030.png" style="width: 96px; height: 95px;">

In CRO we can measure the phase difference by X-Y mode operation.

  • At a phase shift ϕ = 0° or 360°, the pattern indicated by CRO is a diagonal straight line making 45° with the X-axis.
  • At a phase shift ϕ = 45° or 315°, the pattern indicated by CRO is a diagonal clockwise ellipse.
  • At a phase shift of ϕ = 90°, the pattern indicated by CRO is a clockwise rotating circle.
  • At phase shift ϕ = 180°, the pattern indicated by CRO is a diagonal straight line making 135° with the X-axis.
  • At phase shift ϕ = 270°, the pattern indicated by CRO is an anti-clockwise rotating circle.

 

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Related Questions

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