Question

What is a trackball?

a.

A trackball is a touch-sensitive device that is operated by stroking a finger over its surface.

b.

A trackball is a device that translates handwriting directly into text.

c.

A trackball is an upside-down mouse where a weighted ball faces upwards and is rotated inside a static housing.

d.

A trackball is a foot-operated device that moves the cursor by foot pressure on one side or the other of a pad.

Posted under Human Computer Interaction

Answer: (c).A trackball is an upside-down mouse where a weighted ball faces upwards and is rotated inside a static housing. Explanation:A trackball is essentially an inverted mouse. It consists of a weighted ball that faces upwards and is rotated within a static housing. The motion is detected in the same manner as for a mechanical mouse, and the relative motion of the ball moves the cursor on the screen.

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