What is a CRT Monitor ?

• The monitor is the common output device mostly used It is a softcopy output device.
• It can be thought of as a high resolution TV set.
• The monitor can also determine if the display will be colour, black and white, or include graphical objects (pictures).

Two types of monitors are used.

1. CRT monitors.
2. Non CRT monitors.

• Most computer monitors are based on Cathode Ray Tube (CRT) technology.
• The basic operation of these tubes is similar to that in television sets.
• In CRT display CRT is a specialised vacuum tube in which images are produced when electron beam strikes a phosphor surface.
• CRT monitor contains cathode, control grid, acceleration anode, deflection plates & phosphor coated screen.
• Cathode: the cathode is heated by filament and produced high speed & large amount of electrons.
• Control Grid: used to control the brightness of the screen. It controls the number of electrons.
• Accelerating anodes: they are with focusing lens are applied with positive electrons.
• Horizontal deflection plate: moves electron side by side.  Vertical deflection: moves electrons up & down.
• Screen: contains millions of tiny red, green, blue phosphor dot that glow when struck by electron beam that travels across screen to create a visible image.

ADVANTAGES OF CRT DISPLAY –

• Produce more colours.
• Price is lower than LCD & Plasma.
• High contrast ratio.
• Can easily increase brightness of monitor by reflecting the light.

DISADVANTAGES OF CRT DISPLAY

• High power consumed.
• Heavy to pick up and carry.
• Large space required.

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Basic Computer Questions

Q : The main system board of the computer is called ____.
(A) Motherboard
(B) Processor
(C) Microchip
(D) None of these

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Q : Which of the following system components is the brain of a computer?
(A) Circuit board
(B) CPU
(C) Memory
(D) Network card

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Answer ⇒ { B }

 
Q : What is the built-in permanent memory in a computer called?
(A) RAM
(B) ROM
(C) CPU
(D) CD-ROM

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Answer ⇒ { B }

 
Q : Which of the following is the full form of NTFS?
(A) New Tree File system
(B) New Technology file system
(C) New Table file system
(D) Both B and C

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Answer ⇒ { B }

 
Q : Which of the following is not a hardware processing chip ?
(A) Processing chip
(B) printer
(C) mouse
(D) Java

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Answer ⇒ { B }

 
Q : The monitor of a computer is-
(A) storage device
(B) processing device
(C) input device
(D) output device

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Answer ⇒ { D }

 
Q : Which protocol does Ping use?
(A) TCP
(B) ARP
(C) ICMP
(D) BootP
(E) None of these

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Answer ⇒ { C }

 
Q : If you wish to extend the length of the network without having the signal degrade, you would use a ___.
(A) Gateway
(B) Router
(C) Modem
(D) Repeater
(E) Resonator

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Answer ⇒ { D }

 
Q : A series of instructions that tells a computer what to do and how to do it is called a ______.
(A) program
(B) command
(C) user response
(D) processor
(E) None of these

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Answer ⇒ { A }

 
Q : Verification of a login name and password is known as_____.
(A) Configuration
(B) Accessibility
(C) Authentication
(D) logging in
(E) None of these
Answer ⇒ ??