Multiple choice

Which of the following output devices contains an electron gun?

  1. CRT

  2. LCD

  3. Laser printer

  4. Plasma display

  5. Electroluminescent displays
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A Correct answer
Explanation

The Cathode Ray Tube (CRT) is a vacuum tube containing an electron gun (a source of electrons) and a fluorescent screen, with internal or external means to accelerate and deflect the electron beam, used to create images in the form of light emitted from the fluorescent screen.

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