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At least my oppinion without any garantuee: There can be a negative efficiency for example in the case of induction motors driver by inverter and FOC in generator mode. Since you have an induction motors you always have to provide some power in order to magnetize the rotor. The current which magnetizes the rotor causes losses. So there could be some working points where the losses caused due to the magnetization are bigger than the power generated (the negative torque taken away from the rotor).
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The work output of a machine divided by the work input is the?
efficiency.
What is the definition of mechanical efficiency?
Output work divided by input work
A point on the frontier of the production possibilities curve is?
Attainable and the economy is efficient. The line is actually where one would produce at maximum efficiency if it were possible to work at perfect effociency. Although, since we are human and make mistakes, it is impossible for anyone to work at the maximum efficiency.
What is efficiency effectiveness?
Efficiency effectiveness can only be measured by results; cost efficiency, time efficiency, output efficiency, etc.
What is efficiency measured in?
Efficiency is measured in joules.
Percentage of work in to work out?
I think it is efficiency.;)
What is efficiency of a simple machine?
Efficiency % = (work out / work in) * 100 (Work = force * distance)
What is the efficiency of a simple machine?
Efficiency % = (work out / work in) * 100 (Work = force * distance)
The ratio of useful work output to work input is a measure of?
Efficiency
What is a percentage of work in to work out?
efficiency
What is the percentage of energy used to do work called?
The term EFFICIENCY is defined as useful work, divided by total energy expenditure.
What means work output divided by work input?
input force x input distance > output force x output distance -Novanet
How does the output work compare to the input work for a machine that has an efficiency equal to 100 percent?
If a machine has 100 percent efficiency, the output work = the input work. That's actually basically what the efficiency of a machine is - output work / input work * 100.
How can convert efficiency to percent?
Work done = (force * distance)>Efficiency (%) = (Work done output / Work done input) * 100
How efficiency is calculated?
work it out
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.
