Class 9 physics Practice Tests
Class 9 Physics Online Tests
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The MCQ: The efficiency of a solar cell is; "Efficiency" App Download (Free) with answers 0.8, 0.35, 0.55 and 0.03 for online certificate programs. Solve work and energy quiz questions, download Google eBook (Free Sample) for online school courses.
MCQ 1: the efficiency of a solar cell is
MCQ 2: The efficiency of the cyclist when he does 12 J of useful work from every 100 J of food energy he takes is
MCQ 3: The ratio of required output to input is called
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