Which statement best describes a device that has a high energy efficiency? Its ratio of energy absorbed to energy released is high. Its ratio of energy input to energy output is high. It wastes little energy. It wastes a lot of energy.
The efficiency of a machine refers to the ratio of work output to the work input as a percentage.
The efficiency of most machines is less than 100% because some work is lost due to friction and heat.
Therefore, a machine with high efficiency has less wastage of energy due to factors such as friction of the moving parts. Conversely, low efficiency means there is more wastage of energy.
