GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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useful energy input/ energy output x 100%
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useful energy output / energy input x 100%
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useful power output/ power input x 100%
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useful work done /total energy input
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Detailed explanation-1: -The work efficiency formula is efficiency = output / input, and you can multiply the result by 100 to get work efficiency as a percentage.
Detailed explanation-2: -How Do You Calculate Efficiency? Efficiency can be expressed as a ratio by using the following formula: Output ÷ Input. Output, or work output, is the total amount of useful work completed without accounting for any waste and spoilage. You can also express efficiency as a percentage by multiplying the ratio by 100.
Detailed explanation-3: -Efficiency = useful power out ÷ total power in.
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.