IGCSE Information & Communication Technology Paper-1: Specimen Questions with Answers 3 - 3 of 46
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Question 3
Appeared in Year: 2009
Question MCQ▾
Which of the following statements state the disadvantages of CRT monitor?
Choices
| Choice (4) | |
|---|---|
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.