IGCSE Information & Communication Technology Paper-1: Specimen Questions with Answers 3 - 3 of 45

Question number: 3

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Appeared in Year: 2009

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Question

Which of the following statements state the disadvantages of CRT monitor?

Choices

Choice (4)Response

a.

Maintenance is easy.

b.

High Radiation.

c.

High consumption of electricity.

d.

Both c. and b. are correct

Answer

d.

Explanation

The statement High consumption of electricity. and High Radiation. states the disadvantages of CRT monitor.

  • CRT stands for “Cathode Ray Tube. ” CRT is the technology used in traditional computer monitors and televisions. The image on a CRT display is created by firing electrons from the back of the tube to phosphors located towards the front of the display.

  • Once the electrons hit the phosphors, they light up and are projected on the screen. The color on the screen is produced by a blend of red, blue, and green light, often referred to as RGB.

Disadvantages

  • Consumption of electricity: CRT monitors consume electrical power than 2X inch LCD at the same size.

  • Radiation larger: Undeniably, CRT monitors emit radiation that is greater than the LCD monitor. This radiation has a negative impact on the eye so that the eyes get tired or even create a headache for those who are sensitive.

  • Vulnerable distortion, glare and flicker: This is a classic problem for CRT monitors. Distortion effect will be seen when we draw a circle using CorelDraw or other software. If refresh rate too low, causing the monitor be blinking (flicker) and glare (over brightness).

  • Dimensions of large and heavy. CRT monitors have a large size and weight, so it is not suitable for narrow rooms, because a lot of eating places. Quite if the monitor frequently moved around for quite heavy.

  • Poor image quality: Another drawback of CRT is that it displays images with fewer pixel densities when compared to modern display technologies. In other words, when compared to a plasma display or a high-density IPS LCD, images produced by a CRT monitor are less sharp. CRT display technology does not support high definition videos.

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