Which of the following input devices of a computer system functions like most photocopy machines?

Correct option is B

A scanner is an input device that captures images, text, or graphics from physical documents and converts them into a digital format, similar to how a photocopy machine captures an image and reproduces it. However, instead of printing, a scanner saves the output digitally on the computer.

Important Key Points:

1. Scanners are commonly used to digitize printed documents.
2. They function by shining light on the document and capturing the reflected image.
3. Types of scanners include flatbed, handheld, and drum scanners.

Knowledge Booster:

• A trackball is a pointing device used to control cursor movement, not for image capturing.
• A light pen is used to draw or select items directly on a screen, mostly in older systems.
• A digitizer converts analog information (like hand-drawn sketches) into digital data, but does not function like a photocopier.