COMPUTER HARDWARE
INPUT DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Rotating a stationary ball to adjust the pointer on a screen
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Tracking the movement of a laser or LED light across a flat surface
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Pressing keys down to generate different binary inputs
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Turning analogue sound vibrations into electrical signals
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Detailed explanation-1: -The trackball is a pointing device consisting of a ball housed in a socket containing sensors to detect rotation of the ball about two axis, similar to an upside-down mouse. As the user rolls the ball with a thumb, fingers, or palm the pointer on the screen will also move.
Detailed explanation-2: -Unlike other input devices which needs movement like the mouse, a trackball is stationary and does not require much space. It can also work on most surfaces which is a great advantage compared to other input devices.
Detailed explanation-3: -The gumball-sized ball inside the mouse sits between two rollers, each of which attaches to an axle. As users drag the mouse across a smooth surface, the ball spins the rollers. vertical and horizontal rollers. This roller controls left and right cursor move-ments on-screen, which are movements along the X-axis.