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JEE Main & Advanced JEE Main Paper (Held on 10-4-2019 Morning)

  • question_answer
    In a meter bridge experiment, the circuit diagram and the corresponding observation  table are shown in figure
    SI. No. \[R(\Omega )\] \[l(cm)\]
    1. 1000 60
    2. 100 13
    3. 10 1.5
    4. 1 1.0
    Which of the readings is inconsistent? [JEE Main 10-4-2019 Morning]

    A) 4         

    B) 1

    C) 2                                 

    D) 3

    Correct Answer: A

    Solution :

    as \[x=\frac{R(100-\ell )}{\ell }\]             For [a]             \[x=\frac{1000\times (100-60)}{40}\approx 667\] for [b]              \[x=\frac{100\times (100-13)}{13}\approx 669\] for [c]               \[x=\frac{10\times (100-1.5)}{98.5}\approx 656\] for [d]              \[x=\frac{1\times (100-1)}{1}\approx 95\] So option [d] is completely different hence correct Ans. [d]                


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