A rigid, flat board that holds chips and other electronic components. The printed circuit board (PCB) is made of layers, from two to a dozen or more, that interconnect components via copper pathways. The main board in a computer is called the "system board" or "motherboard," while smaller ones that plug into slots on the main board are called "boards" or "cards." See motherboard, expansion card and flexible circuit.
Etched Circuits
The "printed" circuit is an etched circuit. A copper foil is placed over a fiberglass or plastic base of each layer and covered with a photoresist. Light is beamed through a negative image of the circuit paths onto the photoresist, hardening the areas that will remain after etching. When passed through an acid bath, the unhardened areas are washed away, and the finished layers are then glued together. The etching process is also used to create integrated circuits (chips).
Starting in the 1940s
Printed circuit boards (PCBs) were first used in the 1940s to connect discrete components together. By the 1960s, they were widely used in all electronic systems, and as integrated circuits emerged in the 1970s, chips were increasingly mounted on the boards. Today, PCBs hold a few discrete elements but mostly chips, and each chip contains from thousands to billions of transistors (see chip). See surface mount, via and discrete component.
- Keyboard
- Motherboard
- Printer
- LCD
- Scanner
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10 Questions 10 Marks 7 Mins
The correct answer is the Motherboard.
Important Points
- The motherboard is the main circuit of the computer.
- It is also called a system board or logic board.
- It holds and allows connection between all the peripheral devices of the computer.
- It acts as a connector between CPU and memory.
- It has a subsystem called a Central Processor.
- It is also called a Printed circuit board.
- The motherboard has the expansion slots to add more peripheral devices to the computer.
- It has sound cards, video cards, network cards, host bus adapters, TV tuner cards, IEEE 1394 cards, and a variety of other custom components.
- A typical motherboard has a microprocessor, main memory, and other important essential components.
- Other important components like sound or video cards are attached to them by plugins or via cables.
Additional Information
Important Components of Motherboard
Components | Description |
1.Mouse and keyboard slot |
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2. USB (Universal serial bus) |
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3. Parallel port |
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4.CPU Chip |
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5. RAM slots |
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6. Floppy controller |
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7.IDE controller |
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8. PCI slot |
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9. CMOS Battery |
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