3.7 System Box
The system box
consists of three main internal components: the main board, the power supply
and the cooling fan.
1. The mainboard or motherboard
is a flat printed circuit board covered with electrical components. the CPU,
ROM and RAM are on this board. A bus (pathway) links input, output, storage,
process and control devices by wires and connectors.
2. The power supply unit
transforms the 240Vac to a lower voltage similar to a battery. There is a
significant magnetic field around power supplies and magnetic disks should not
be stored near the system box.
3. The cooling fan assists in
ventilation and filters keep the dust out. Big computer systems need cooling
fluid instead of air.
Write
out the sentence and fill in the missing word
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The system box is the ????? of the computer and its contents. |
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????? is a flat printed circuit board that is covered with electrical components. |
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The main board contains ????? circuits for the CPU, ROM and RAM. |
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All the electrical components on the main board are linked to the CPU by a ?????. |
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The main board contains ????? to extend the capabilities of your computer. |
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Ports are located at the ????? of the system box to connect to peripheral devices. |
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????? transforms mains voltage to a lower level that can be used by the computer. |
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The power supply unit generates the most ????? which can lead to component failure. |
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Cooling fan draws air into the ?????. |
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Large computer systems need ????? to be circulated around them for cooling. |