Class 9 Physics Study App | Physics: Efficiency Quiz e-Book PDF

Class 9 Physics MCQs (Grade 9) From Textbook

Class 9 Physics MCQs – Certification Test 384

Physics: Efficiency Quiz (Question 384) – Study App & e-Book Download

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MCQ 384: An body builder does 15 Joules of useful work from every 60 Joules of food energy which he takes. His efficiency will be:

  1. 0.15
  2. 0.25
  3. 0.3
  4. 0.35

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