mathrm{Efficiency}=frac{mathrm{Useful power output}}{mathrm{Total power input}} If energy output and input are expressed in the same units, efficiency is a dimensionless number. Where it is not customary or convenient to represent input and output energy in the same units, efficiency-like quantities have units associated with them. For exa...
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http://en.wikipedia.org/wiki/Electrical_efficiency
The electrical efficiency of an entity (a device, component, or system) in electronics and electrical engineering is defined as useful power output divided by the total electrical power consumed (a fractional expression), typically denoted by the Greek letter small Eta (η).
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http://en.wikipedia.org/wiki/Glossary_of_fuel_cell_terms
The ratio of the average RF output power of a tube to the total dc input power.
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https://www.encyclo.co.uk/local/20757
Electrical output in relation to fuel input
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https://www.encyclo.co.uk/local/20849
No exact match found.
