SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Equation for efficiency
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(useful energy / total energy) x 100%
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(total energy / useful energy) x 100%
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(waste energy / total energy) x 100%
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(useful energy / waste energy) x 100%
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Explanation:
Detailed explanation-1: -Since efficiency is given by: Efficiency=Useful energy outputTotal energy input×100% Efficiency = Useful energy output Total energy input × 100 %, we have to find the useful energy output. In this case, the useful energy output is the lifting of the 10 N load through 5 m.
Detailed explanation-2: -We can calculate the efficiency of anything by dividing the energy input and the energy output by 100%. We use this equation generally to represent the energy in the form of heat or power.
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