a What do you understand by the term efficiency of the machine?b A machine has an efficiency of 70 (2024)

FAQs

What do you understand by the term efficiency of a machine? ›

The efficiency of a machine is the ratio of the work done on the load by the machine to the work done on the machine by the effort. Thus, it is the ratio of useful work done by the machine output to the work done by the machine input. It is represented by the Greek symbol η ( e t a ) .

If a machine is 70% efficient, it means that 70% of the work input to the machine is obtained as the useful work output. The remaining 30% of the work input has been lost in overcoming the friction and other factors.

The term efficiency can be defined as the ability to achieve an end goal with little to no waste, effort, or energy. Being efficient means you can achieve your results by putting the resources you have in the best way possible. Put simply, something is efficient if nothing is wasted and all processes are optimized.

If the machine is 60% then that means machine is capable of converting 60% work from input to output. For better understanding we take an example like we apply 100 J work as input in machine and machine efficiency is 60% then we will get only 60 J work as output.

Answer: It means that machine converts 80% of the power of its input fuel source to actual work. There is 20% waste likely as heat, noise or wear.

Ener. An efficiency of 100% would mean that the machine in question would use absolutely all of its input energy to do its work, since a machine's efficiency equals its energy output divided by its energy input.

If a machine is very efficient, that implies it wastes very little enegy and uses most of the energy in doing some useful work.

A machine cannot be 100 per cent efficient because the output of a machine is always less than the input. A certain amount of work done on a machine is lost to overcome friction and to lift some moving parts of the machine.

If the efficiency of a machine is 90%, this means that 90% of work input has been lost in overcoming friction.

Examples of efficiency in a Sentence

Because of her efficiency, we got all the work done in a few hours. The factory was operating at peak efficiency. A furnace with 80 percent fuel efficiency wastes 20 percent of its fuel. The company is trying to lower costs and improve efficiencies.

What is the best way to describe efficiency? ›

performing or functioning in the best possible manner with the least waste of time and effort; having and using requisite knowledge, skill, and industry; competent; capable: a reliable, efficient assistant. satisfactory and economical to use: Our new air conditioner is more efficient than our old one.

Efficient means "capable of producing desired results without wasting materials, time, or energy". The difference is that when something is effective it produces a result even if it takes some unnecessary resources to do so.

The meaning of the statement “ An efficiency of the engine is 40 percent “ is that only 40 percent of input energy is utilised to do output work. The ratio of output and input energy is 0.4. Or, in terms of percentage, it is 40 percent.

85% efficiency of simple machine means that with 100% input, the machine will give a work output of 85%. EXPLANATION: The efficiency of a machine is the ratio of its Mechanical Advantage to its Velocity.

If a machine is not capable of doing some work in the reversed direction, after the effort is removed, then the machine is known as non-reversible or self locking machine. The condition for a machine to be non-reversible or self locking is that its efficiency should be less than 50 %.

Efficiency of a machine is a crucial metric that indicates how well a machine performs in converting input resources (such as energy, time, or raw materials) into desired output (production, products, or services).

A machine's efficiency measures how efficiently its input energy is turned into usable output energy or work. So, the expression for calculating the efficiency of a machine is Efficiency η = Output energy Input energy ​ .

The efficiency of a simple machine is always less than 100% due to energy losses caused by friction and other factors. The efficiency is calculated as the ratio of output work to input work, expressed as a percentage.