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With respect to CRT, the horizontal retrace is defined as :

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UGC NET Computer Science (Paper 3) Nov 2017 Official Paper
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  1. The path an electron beam takes when returning to the left side of the CRT.
  2. The path an electron beam takes when returning to the right side of the CRT.
  3. The technique of turning the electron beam off while retracing.
  4. The technique of turning the electron beam on/off while retracing.

Answer (Detailed Solution Below)

Option 1 : The path an electron beam takes when returning to the left side of the CRT.
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Detailed Solution

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The correct answer is option 1.

Key Points

 Horizontal retracing is also known as vertical retracing. The beam returns to the left of the screen at the end of each scan line to show the next scan line.

F1 Raju.S 29-04-21 Savita D1
∴ Hence the correct answer is The path an electron beam takes when returning to the left side of the CRT.

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