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NEET Sample Paper NEET Sample Test Paper-69

  • question_answer
    A thin copper wire of length metre increases in length by \[2%\] when heated through\[10{}^\circ C\]. While is the percentage increase in area when a square copper sheet of length / metre is heated through\[10{}^\circ C\]?

    A) \[4%\]                           

    B) \[8%\]

    C) \[16%~\]                      

    D) None of the above

    Correct Answer: A

    Solution :

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


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