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NEET Sample Paper NEET Sample Test Paper-84

  • question_answer
    A metallic bar is heated from \[0{}^\circ C\] to\[100{}^\circ C\]. The coefficient of linear expansion is \[{{10}^{-5}}{{K}^{-1}}\]. What will be the percentage increase in length?

    A) 0.01%  

    B)        0.1%

    C) 1%                               

    D) 10%

    Correct Answer: B

    Solution :

    [b] \[\frac{\Delta \ell }{\ell }=\alpha \,\Delta \,T\,={{10}^{-5}}\times 100={{10}^{-3}}\] \[\frac{\Delta \ell }{\ell }=\times 100%={{10}^{-3}}\times 100\] \[={{10}^{-1}}=0.1%\]


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