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UPSC Physics Work, Energy And Power / कार्य, ऊर्जा एवं शक्ति Question Bank Laws of Motion, Force, Work, Energy and Power, Centre of Mass

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          Two persons do the same amount of work, one in 10 s and the other in 20 s. Find the ratio of the power used by the first person to that by the second person.

    A) 6 : 4                 

    B)      2 : 1

    C) 5 : 2                 

    D)      4 : 3

    Correct Answer: B

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