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The efficiency of a machine is usually expressed as a percentage. The ideal efficiency of a machine is 100-percent.
Another Answer
There are no units of measurement for efficiency, because you are comparing like with like: output power divided by input power.
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∙ 9y ago
ice_FN
the efficiency of a machine is usually expressed in
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What do you understand by efficiency of motor or generator?
The efficiency of any machine is the output power divided by the input power, usually expressed as a percentage.
What of the machine compares the output work to the input work and is expressed as a percent?
That's the machine's "efficiency".
When discussing engines the ratio of output work to input work expressed as a percentage is called .?
The efficiency of the machine.
How do you calculate efficiency and how is it expressed?
For efficiency, you have to consider the energy or work that you get out of the machine, compared to the energy or work that you put into the machine. Its what you get out, divided by what you put in. By multiplying the result by 100, you should then get the efficiency expressed as a percentage, which is the normal way of describe how efficient a machine or process is. efficiency = (Work out/Work in) x 100 Sometimes you are given the efficiency in a problem, but then have to calculate either the work out or work in, so then its just a case of rearranging the equation above.
What is an efficiency ratio?
The efficiency ratio for a machine usually refers to the ratio of the useful energy available from a machine and the energy put into it.
What does efficiency mean in science?
The Efficiency of a system is the ratio (Input Energy / Output Energy). The fraction is usually expressed as a percentage.
What is the Formula for calculating the efficiency of a machine?
Efficiency = Output value / Input valueFor example, if a machine needs 10 KW to run and produces 8 KW, its power efficiency is 8/10 = 0.8 or 80%Efficiency is always between 0 and 1 (or 0 and 100 if expressed as a percentage.)
Efficiency can be express mathematically as?
Efficiency = Output/Input. This is usually expressed as a percentage but may be given in the form of a ratio.Another AnswerEfficiency is output power divided by input power, normally expressed as a percentage.
The efficiency of machines is usually expressed in?
Efficiency is expressed as a factor, like 0.9, or a percentage - the above is equivalent to 90%. An efficiency of 90% means that 90% of the input energy (or a factor of 0.9) is converted into whatever you want to convert it to; the remainder is wasted.
Does efficiency indicate how much energy a machine wastes?
When expressed as a percentage, 100% minus percentage indicates the waste percentage.
Why is the efficiency of 1.0 is not achievable?
In any machine, some energy will usually be wasted. This will reduce the efficiency below the theoretical maximum of 1.0. However, please note that, if the efficiency is above 95% (or 0.95), when rounded to the nearest tenth you will get 1.0.In any machine, some energy will usually be wasted. This will reduce the efficiency below the theoretical maximum of 1.0. However, please note that, if the efficiency is above 95% (or 0.95), when rounded to the nearest tenth you will get 1.0.In any machine, some energy will usually be wasted. This will reduce the efficiency below the theoretical maximum of 1.0. However, please note that, if the efficiency is above 95% (or 0.95), when rounded to the nearest tenth you will get 1.0.In any machine, some energy will usually be wasted. This will reduce the efficiency below the theoretical maximum of 1.0. However, please note that, if the efficiency is above 95% (or 0.95), when rounded to the nearest tenth you will get 1.0.
How do you calculate the efficiency of a machine?
Efficiency is nothing but calculating how the machine is performing for what it has been made for, Efficiency is usually calculated in % as (output/input )X100. for Eg. the Thermal efficiency of an reciprocating gasoline engine can be calculated as follows, Let, the input for an reciprocating engine is 12MJ and its out put is 4MJ then Efficiency is (4/12)X100 = 33%
