Explain any five input and output device with there warking
Answers
common output devices.
Printer
The printer is a very important component of a computer. It gives you a printed result of what is displayed on the monitor. The output received from the printer is called hard copy because you can retain it even after you turn off the computer or are no longer working on it. When you look at the printing techniques there are mainly three types of printer:
1. Page printer
2. Character printer
3. Line printer
Page printer
Page printer can printer a whole page in one go. The examples of page printer are line printer or an inkjet printer. This printer has to store each and every page in memory before printing it. The inkjet printer works by spraying tiny drops of ink on the paper. It can print in colour as well as in black and white format. The quality of printing is good and it does not make any noise. The speed of this printer is measured in pages per minute.
Character printer
Character printer is slow in comparison to the other two printers. It prints around 30 to 600 characters per second. The example of the character printer is a dot-matrix printer. Dot-matrix printer works like a typewriter. It creates an impression on a paper by pressing the ends of the pins that are fixed on its prints heads. The printer offers the low-quality printing and is very noisy.
Monitor
The monitor is another important component of a computer. It is used to display the processed information. It is known as a visual display unit (VDU). The pictures that are displayed on the screen are shown by using a large number of tiny dots known as pixels. These pixels that are shown on the monitor is referred to as the resolution of the screen.
There are mostly two types of monitors:
1. LCD or liquid crystal display monitor.
2. CRT or Cathode Ray tube monitor.
LCD monitors are lighter in weight can compare to CRT monitors and they are very popular nowadays. The output that is displayed on the screen is known as the soft copy output as it cannot be retained for a longer time.
The various examples of input data are a mouse, keyboard, light pen, etc.
Mouse
The mouse is found on every computer. It is an integral part of it. It is a pointing device. The main principle it works on is point and click. The mouse uses the trackball to give the motion to the pointer displayed on the screen. Usually, for the windows based programs, a mouse is used. Nowadays wireless mouses are becoming more popular among people.
Keyboard
The keyboard is used to enter all the data into the computer. It directs the computer through instructions. Normally keyboard has 104 buttons called the keys. You can do various tasks through the keyboard. You can program, type, etc through keyboard only.
Scanner
The scanner is used to store photographs, picture, diagrams into the computer. It saves the image in the form of a file by reading it.
Touchscreen
Touchscreen monitors are becoming more and more popular. It requires putting the input to the computer through the touch by your finger, pen, stylus, etc. You can give any sort of information to the computer by touching it.
Light pen
A light pen is another pointing device that can be used in the computer. It is normally like a pen and is used to directly point at the objects seen on the screen. You can also draw various objects on the computer screen through a light pen.
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input:- mouse, keyboard, josstick,
output:- printer, speaker, plotter etc