You need to select a laptop for a traveling salesman. He will really need to stretch the battery life as long as possible, so he wants low power options wherever possible. Which type of monitor…

Question

Options

• ALCD
• BCRT
• CActive Matrix
• DPassive Matrix

• A
  2% (1)
• B
  4% (2)
• C
  10% (5)
• D
  84% (43)

Explanation

Passive matrix LCD monitors use less power than active matrix, and are generally preferred for laptops when long battery life is the key concern. Answer option C is incorrect. An active matrix LCD uses more power than a passive matrix, but gives a higher quality picture. Answer option B is incorrect. Cathode Ray Tube monitors are legacy monitors that were once Answer option A is incorrect. All laptops use LCD monitors. The question is whether or not one should select an active or passive matrix LCD. What is Cathode Ray Tube (CRT)? Cathode Ray Tube (CRT) is a vacuum tube used as a display screen in a computer monitor or TV. The viewing end of the tube is coated with phosphors, which emit light when struck by electrons. CRT works by heating a cathode which causes electrons to flow. Accelerating and focusing anodes turn the electrons into a fine beam that is directed to the phosphors by magnetic fields that are generated by steering coils. The viewing end of a color CRT tube is coated with red, green and blue phosphor dots, and separate "electron guns" bombard their respective colors a line at a time in a prescribed sequence. The resulting color displayed on screen is determined by the intensity of the electron beams as they strike the red, green and blue phosphors at that same pixel location.

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