most computers use a standard 240 volt power usage, but 230 volts and 115 are also fairly common. laptop power usage can vary between 15v and 20+v
A laptop.
When your computer will not power on. When the cooling fan of the power supply has failed. When the amount of hardware in use in your case exceeds the power capability of your power supply.
farming. Example: 3D animation movie companies buy computer power on a 'render farm'.
The Power Supply. It is what you plug the power cord into.
keyboard
Typewriter can use without electricity/power. Computer require power supply to type. In typewriter as you type the matter, the Hardcopy also is ready. In computer first you need to type then you need the help of printer to get the hardcopy. Typewriter is less expensive and computer more expensive
A laptop.
This depends on the screen type, the screen size, and also the computer's power. For example; a low power computer may use 200watts, where a high power gaming setup might use 800watts. A screen could use as little as 5watts, if it is a small LCD screen, while a big CRT monitor might use 200watts. Your screen should tell you it's power usage, as should your computer, if you examine the power supply.
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In order to supply power supply to your computer you would need an outlet plug near your computer. Then you can plug your computer into that and necessarily, use an extension.
The power supply makes the computer run, without any type of power supply it would be impossible to run a computer. The mains power supply for a laptop and the power supply unit of a desk top, both convert the high AC voltage from the mains power and convert it to low voltage DC, for the electronics of a computer to use.
Desktop Compact Computer
a type of program that you can create presentations on.
You obviously use your computer, and you use the keyboard that's on your computer, you type the words that are on the keys, and press space after every word :)
to type in stuff :)
Asus Laptop
The Power Supply. It is what you plug the power cord into.