NEET Sample Paper NEET Sample Test Paper-8

  • question_answer If there is a positive error of 50% in the measurement of velocity of a body, then the error in the measurement of kinetic energy is:

    A)  \[15%\]                       

    B)  50%

    C)  \[100%\]                    

    D)  125%

    Correct Answer: D

    Solution :

    Kinetic energy \[\varepsilon =\frac{1}{2}m{{\upsilon }^{2}}\] \[\frac{\Delta \varepsilon }{\varepsilon }\times 100=\frac{V{{'}^{2}}-{{V}^{2}}}{{{V}^{2}}}\times 100\] \[=[{{(1.5)}^{2}}-1]\times 100\] \[\frac{\Delta E}{E}\times 100=125%\]

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