characteristics/functions of the following I/O devices:

Questions characteristics/functions of the following I/O devices:
akankshat.ngPublished on: 10/18/2018 5:29:12 PM

Explain the characteristics/functions of the following I/O devices:  
(i)  Inkjet printer  
(ii) Power Connector  
(iii)Video Card  
(iv) Magnetic Stripe Reader 

1 Answers
Best Answer 0
admin 9/28/2018 12:55:00 PM

Answer :

(i) Inkjet printer

In the inkjet printing mechanism, the print head has several tiny nozzles, also called jets. As the paper moves past the print head, the nozzles spray ink onto it, forming the characters and images. An inkjet printer can produce from 100 to several hundred pages, depending on the nature of the hard copy, before the ink cartridges must be replaced. There is usually one black ink cartridge and one so-called color cartridge containing ink in primary pigments (cyan, magenta, and yellow). Some inkjet printers use a single cartridge with cyan, magenta, yellow, and black ink. A few models require separate cartridges for each primary pigment, along with a black ink cartridge.

(ii) Power Connector

Power connectors are devices that allows an electrical current to pass through it for the exclusive purpose of providing power to a device (not a data stream, for example, or anything more complex). Although it can be used with many different types of electronics, customers must find the specific type of connector that best matches their electronics’ geometry and electrical needs.

(iii)Video Card :

A video card is a piece of computer hardware that's rectangular in shape with numerous contacts on the bottom of the card and one or more ports on the side for connection to video displays and other devices.

The video card installs in an expansion slot on the motherboard. While most video cards are of the PCIe format, video cards come in other formats as well, including PCI and AGP. These additional formats are older standards and don't communicate with the CPU and other components as quickly as PCIe.

(iv) Magnetic Stripe Reader

A magnetic stripe reader, also called a mag stripe reader, is a hardware device that reads the information encoded in the magnetic stripe located on the back of a plastic badge. Magnetic stripe readers can be read by a computer program through a serial port , USB connection, or keyboard wedge , and are generally categorized by the way they read a badge. For instance, insertion readers require that the badge be inserted into the reader and then pulled out. Swipe readers require that the badge pass completely through the reader.