COMPUTER FUNDAMENTALS

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COMPUTER HARDWARE

COMPUTER MEMORY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In ____, the touch screen device uses ultrasonic waves to process information. The change in the waves is registered and information is sent to the controller. A surface wave touch screen can be easily affected by foreign elements like dust and water.
A
surface wave technology
B
resistive technology
C
capacitive technology
D
None of the above
Explanation: 

Detailed explanation-1: -Surface acoustic wave technology makes use of ultrasonic waves for detection. It is often abbreviated to SAW.

Detailed explanation-2: -Surface wave touch screen monitors use ultrasonic waves to process inputs from the screen. A surface wave touch screen display is composed of two transducers (acting as receivers and senders) positioned along the X and Y axis of the display’s glass layer.

Detailed explanation-3: -A SAW (surface acoustic wave) or surface wave touch screen sends ultrasonic waves and detects when the screen is touched by registering changes in the waves. This technology is more advanced than the other two but does not work with hard materials and can be affected by outside elements.

Detailed explanation-4: -The conducting layer is connected to a low voltage so that for a short time, there is a tiny electric current on the screen. This leaves it with a small electric charge. When your finger touches the screen, some of the small electrical charge flows on to it.

There is 1 question to complete.
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