Laser printers differ from thermal printers because:

Question

Options

• Athey use an electro-static field while thermal printers use heating elements to expose the image.
• Bthey use ink while thermal printers use a ribbon to transfer the image on the paper.
• Cthey use laser while thermal printers use heat to melt the toner on the paper.
• Dthey use heat to expose the image while thermal printers use heat to transfer the image.

• A
  88% (35)
• C
  5% (2)
• D
  8% (3)

Explanation

The fundamental difference lies in how each technology forms an image. Laser printers use a laser beam to discharge specific areas of a photosensitive drum that has been uniformly charged with static electricity (an electrostatic field), causing oppositely charged toner to adhere to those areas. Thermal printers use heating elements - either to activate heat-sensitive paper directly (direct thermal) or to melt ink from a ribbon onto paper (thermal transfer). Answer A correctly identifies this core distinction. The other options are wrong: laser printers use ink (toner is powdered ink), not just heat, and the electrostatic charge - not heat - is what forms the latent image on the drum before fusing.

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