Define energy conversion efficiency. Also state the first law of thermodynamics and mention its significance through fuel input as in petrol. An IC engine has an input of 500KWh. Energy equivalent to 350 KWh is utilized for running a motor. What is the energy conversion efficiency?

Energy conversion efficiency is defined as the ratio of useful output energy to the total input energy in an energy conversion process. It is a measure of how effectively an energy system converts the input energy—often in the form of fuel or electricity—into a usable form such as mechanical energy, electrical energy, or thermal energy. This efficiency is usually expressed as a percentage and is a critical parameter in evaluating the performance of energy systems, from power plants to everyday appliances like internal combustion engines and electric motors.

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