COMPUTER SCIENCE AND ENGINEERING
OPERATING SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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amperes
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ohms
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volts
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watts
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Detailed explanation-1: -A power supply’s efficiency rating tells you how much energy makes the conversion from AC power (what it draws from the wall) to DC power (what your PC’s components run off of).
Detailed explanation-2: -If you’ve calculated that your system is going to use 500 watts (a common number for a straightforward gaming build), choosing a PSU with 600 or 650-watt output could be a good option, as it will give you some overhead to work with, and also allow for potential future upgrades.
Detailed explanation-3: -The efficiency of a power supply is simply the ratio of the power out vs the power in. So, if we measure the input voltage and current draw, we can calculate the input power. If we measure the output voltage and current draw, we can calculate the output power.
Detailed explanation-4: -The power electronics system operates at the rated output-power level, and, by measuring the input power and output power, you can calculate the systems efficiency using the equation =(POUT/PIN)×100%, where POUT is output power and PIN is input power.