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Which of the following is like a copier machine and used to scan documents by placing them upside down on a glass plate?1. OMR2. Hand-held scanner3. Plotter4. Flatbed scanner

Answer» Correct Answer - Option 4 : Flatbed scanner

The correct answer is a Flatbed scanner.

  • The flatbed scanner is used to scan documents by placing them upside down on a glass plate.
  • A flatbed scanner provides a flat, glass surface to hold a sheet of paper, book, or another object for scanning.
  • The scan head is moved under the glass.
  • Flatbed scanners often come with sheet feeders for scanning multiple sheets of paper rather than one at a time.

Working of Flatbed Scanner:

  • For modern scanners, a Charge-coupled device [CCD] is used.
  • A CCD sensor is used to capture the light from the scanner and then convert it into proportional electrons.
  • The charge developed will be more if the intensity of light that hits on the sensor is more. 


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