(3) Which different type of monitors …

Monitor is an output device that receives processed information from the computer's CPU and displays it for the user.

Monitor is a computer peripheral, which is an electronic screen. The display in electronic form is called a softcopy. Monitor is also called as a visual display unit.   The display is made up of a series of dots called pixels.

Different types of monitors are:

Cathode Ray Tube (CRT)

CRT was in used until 21st century, but now they are phased out. It contains a vacuum tube that displays images using multiple electron guns and a phosphorescent screen.

Liquid Crystal Display (LCD)

LCD using liquire crystals to display images and the screen used is a flat panel of display.

Light Emitting Diode (LED)

LED uses semiconductor light source, where light is emitted when electricity flows through it.

Plasma Display

In a plasma display, each pixel is illuminated by plasma (also called as charged gas). It is thinner than CRT and LCD.

As a rule, specialists name three types based on what is inside them.

These types are:

CRT – Cathode Ray Tube

LCD – Liquid Crystal Display

LED – Light Emitting Diodes