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O Level Physics Study App Download - Efficiency: O Level Physics Apps (iOS & Android)

O Level Physics MCQ - Complete Course

Efficiency: O Level Physics MCQ App Download & e-Book - 546

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MCQ: 546

A machine uses total energy of 5000 J and within the process one-fourth of the energy is lost to the surroundings. The efficiency of the machine is

  1. 25%
  2. 50%
  3. 75%
  4. 90%

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