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Question

The Efficiency(E) of any machine is given by:-


  1. E=Work inputWork output 

  2. E=Work outputWork~ inputorE=MAV.R.

  3. E=EffortLoad

  4. E=V.R.MA


Solution

The correct option is B

E=Work outputWork~ inputorE=MAV.R.


Mechanical efficiency(E) measures the effectiveness of a machine in transforming the energy and power that is input to the device into an output force and movement. In simple words, it is calculated by taking the ratio of output work to input work.

i.e. Efficiency is written as,

E=Work outputWork input

i.e. E=MAV.R.

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