are connected to the ports and interfaces found on the rear side of a computer (Figure . ). The external devices can be connected to the ports and interfaces. The various types of ports are given below: Chapter Page - - Serial Port: To connect the external devices, found in old computers.
Parallel Port: To connect the printers, found in old computers. USB Ports: To connect external devices like cameras, scanners, mobile phones, external hard disks and printers to the computer. USB . is the third major version of the Universal Serial Bus (USB) standard to connect computers with other electronic gadgets as shown in Figure .
. USB . can transfer data up to Giga byte/second. USB3.
and USB . are also released. Figure . USB .
Ports VGA Connector: To connect a monitor or any display device like LCD projector. Audio Plugs: To connect sound speakers, microphone and headphones. PS/ Port: To connect mouse and keyboard to PC. SCSI Port: To connect the hard disk drives and network connectors.
Mouse Port Keyboard Port VGA Port HDMI Port USB Port Network Port Serial Port Power Supply Fig . Ports and Interfaces High Definition Multimedia Interface (HDMI) High-Definition Multimedia Interface is an audio/video interface which transfers the uncompressed video and audio data from a video controller, to a compatible computer monitor, LCD projector, digital television etc. Micro HDMI HDMI Figure . HDMI Ports Activity Student Activity • Identify the components of a computer • Connecting external devices like printer/LCD projector.
Teacher Activity • Show the components of a computer • Display different ROM ICs • Display the flash memory • Demonstrate various ports and their usage Chapter Page - - SECTION – A Choose the correct answer . Which of the following is said to be the brain of a computer? (a) Input devices (b) Output devices (c) Memory device (d) Microprocessor . Which of the following is not the part of a microprocessor unit?
(a) ALU (b) Control unit (c) Cache memory (d) register . How many bits constitute a word? (a)