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NEET Physics Mathematical Tools, Units & Dimensions Question Bank Errors of Measurement

  • question_answer
    A thin copper wire of length l metre increases in length by 2% when heated through 10ºC. What is the percentage increase in area when a square copper sheet of lengthlmetre is heated through 10ºC 

    A)                4%                                   

    B)          8%

    C)          16%                              

    D)          None of the above

    Correct Answer: A

    Solution :

                 Since percentage increase in length = 2 %               Hence, percentage increase in area of square sheet          \[=2\times 2%\] = 4%


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