JEE Main & Advanced AIEEE Solved Paper-2011

  • question_answer
    If a wire is stretched to make it 0.1% longer, its resistance will   AIEEE  Solved  Paper-2011

    A) Decrease by 0.05%            

    B) Increase by 0.05%

    C) Increase by 0.2%

    D) Decrease by 0.2%

    Correct Answer: C

    Solution :

                 \[R\propto {{l}^{2}}\] \[\frac{\Delta R}{R}=\frac{2\Delta l}{l}\]


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