O-LevelPhysicsEnergy & Work5054/12 · Oct/Nov 2021 · Q131 Mark
Which equation is used to find the efficiency of an energy transfer?
Aefficiency = useful energy output / total energy input
Befficiency = total energy input / useful energy output
Cefficiency = energy converted to the required form / total power input
Defficiency = (energy converted to the required form) × (total energy input)
✓ Correct answer
A: efficiency = useful energy output / total energy input
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Energy & Work and see which topics are most likely to come up next.
Sign up free →