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An automatic voltage regulators, by regulating the level of voltage in an alternating current (AC) system to a narrower range of output, protects parts of the system that might be damaged by surges or drops in power. It is designed to automatically maintain a constant voltage level. It regulates the sudden flow of electric current from AC supply to the PC. It may use an electromechanical mechanism, or passive or active electronic.

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Q: What are the importance of using an AVR when plugging your computer into power source?
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