A-LevelPhysicsWork, energy and power9702/12 · Feb/Mar 2017 · Q161 Mark
The total energy input Eᵢₙ in a process is partly transferred to useful energy output U and partly transferred to energy that is wasted W. What is the efficiency of the process?
AU
Eᵢₙ
× 100%
BW
Eᵢₙ
× 100%
CU
W
× 100%
DU+W
Eᵢₙ
× 100%
✓ Correct answer
A: U Eᵢₙ × 100%
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