COMPUTER PERIPHERALS
AUDIO AND VIDEO DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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12V DC
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120 V AC
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240V Ac
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None of the above
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Detailed explanation-1: -A 12V power supply takes any input between 100V and 220V AC, which is what comes from a wall socket, and gives an output of 12V DC.
Detailed explanation-2: -Not directly. Desktop machines get their power from the grid, at 120/220V. Laptops get their power from battery or an external power brick. While it is certainly possible to have a 12V battery, virtually every laptop battery I’ve ever seen operated between 15 to 20V (usually closer to 20V).
Detailed explanation-3: -If you meant it literally, “run off of a DC battery directly”, the answer is NO, you cannot hook A battery to a desktop computer and expect it to run! The main reason is regular desktop motherboards needs multiple voltages.
Detailed explanation-4: -Personal computers, like most electronic devices with transistors, run on direct current (DC). Your computer’s power supply both converts the alternating current (AC) from an American wall socket to the DC necessary for the internal power needs of the computer, and regulates the voltage.