Chapter 9: Class 9 Physics Exam Tests
Class 9 Physics MCQs - Chapter 9
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MCQ 66: The ratio of required output to input is called
MCQ 67: When a body vibrates, it produces
MCQ 68: 1 joule is equal to
MCQ 69: In nuclear power plants, we get energy as a result of
MCQ 70: The potential energy is given by
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