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JIPMER2018PhysicsThermodynamics

If a machine perform 4000 J output work and 1000 J is inside loss due to friction, then the find efficiency?

Options

  1. A80 %
  2. B30 %
  3. C25 %
  4. D60 %

Correct answer

A. 80 %

Step-by-step solution

Efficiency = output work input work 100= W _ o W _ i 100 aligned & W _ o =4000 ~J & W _ i =4000+1000=5000 ~J & Efficiency = 4000 5000 100=80 % aligned

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