Edexcel GCSE Design and Technology · 1DT0
Specification 1.3.3, 1.5.2 · Paper 1
Revise: Selecting Energy SourcesCircuit efficiency also affects source choice. A more efficient system wastes less of the supplied energy, reducing the energy needed for the same useful task. Designers should consider efficiency and, where applicable, the product’s energy rating alongside its connections.
The proportion of input work transferred into useful output work, commonly expressed as a percentage. For a mechanism, .