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Why efficiency increases with load?

Updated: 12/22/2022
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Q: Why efficiency increases with load?
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What would happen to a pulley system if the load were increased?

Ideal mechanical advantage is the mechanical advantage when there is no friction. It is the mechanical advantage when the efficiency of the pullefy system is 100%. It is a constant for that system of pulleys. Therfore it is not affected by increasing or decreasing the load. But actual mechanical advantage will be less than this ideal mechanical advantage due to friction. In other words the efficiency will be less than 100 %. If the efficiency is 80%, it implies 20% is wasted due to friction while lifting a load. If we increase the load the friction also increases and hence the efficiency will decrease with the load.


Why are distribution transformers frequently designed to develop maximum efficiency at loads that are somewhat lower than rated value?

It is always desirable to run any equipment or device at maximum efficiency for that matter, not only the power transformer. Power transformer maximum efficiency occurs when copper loss is equal to iron loss. (or no load loss equals to load loss). This does not necessariliy mean that maximum efficiency occurs at maximum or full load. Generally the maximum efficiency occurs at relatively less than full load of the transformer.


What is mechanical efficiency in science?

mechanical efficiency is the percent of the energy that you put into a machine that was transferred to the load.


What is the range of thermal efficiency of good IC engine at rated load?

60 to 70%


Why Amplifier of class B has high theoretical efficiency of 78.5 percent?

The Class B amplifier is a push pull amplifier with 78.5% efficiency. The high efficiency is due to the absence of power consumption during idle time which simultaneously increases the efficiency.

Related questions

What would happen to a pulley system if the load were increased?

Ideal mechanical advantage is the mechanical advantage when there is no friction. It is the mechanical advantage when the efficiency of the pullefy system is 100%. It is a constant for that system of pulleys. Therfore it is not affected by increasing or decreasing the load. But actual mechanical advantage will be less than this ideal mechanical advantage due to friction. In other words the efficiency will be less than 100 %. If the efficiency is 80%, it implies 20% is wasted due to friction while lifting a load. If we increase the load the friction also increases and hence the efficiency will decrease with the load.


When is the efficiency maximum in a transformer?

the efficiency is maximum in a transformer when no load loss is equal to load loss.


When you increase the height of a ramp which increases the angle does the efficiency for kinetic energy increase of decrease?

The energy efficiency increases as the angle increases.


If load increases then what happens?

If load increases then it will stop completely. Having an overload can cause issues.


What is the relationship between the load on a muscle and its strength of contraction?

Strength of contraction increases as the load increases until the load becomes excessive.


What is the Relationship between a load on a muscle its strength of contraction?

Strength of contraction increases as the load increases until the load becomes excessive.


Why are distribution transformers frequently designed to develop maximum efficiency at loads that are somewhat lower than rated value?

It is always desirable to run any equipment or device at maximum efficiency for that matter, not only the power transformer. Power transformer maximum efficiency occurs when copper loss is equal to iron loss. (or no load loss equals to load loss). This does not necessariliy mean that maximum efficiency occurs at maximum or full load. Generally the maximum efficiency occurs at relatively less than full load of the transformer.


What is mechanical efficiency in science?

mechanical efficiency is the percent of the energy that you put into a machine that was transferred to the load.


Does compressor work more efficiently with an increased head pressure?

It depends on other conditions too. There is a net suction head, which is the pressure from which the compressor is drawing the gas. An increase here will often improve the compressor's efficiency. There is also a net discharge head, which is the pressure the compressor is trying to maintain. An increase here will often decrease the compressor's efficiency. There is an efficiency curve for all compressors, and they are all different based on their design, it is dependent on the differential pressure (NDH - NSH) and load (air flow in SCFM, typically) of the compressor, at a certain load the efficiency peaks then drops as the load increases.


What angiosperm adaptation increases the efficiency of pollination?

Flowers


Why the load voltage increases when the load used is capacitive?

capacitive reaction


An exhaust system expansion box is for?

It increases engine power and also increases fuel efficiency.