JEE Main & Advanced Sample Paper JEE Main Sample Paper-1

  • question_answer
    Which equation is dimensionally incorrect, where symbol represent their usual-meaning?

    A)  \[I=p+mgt\]                     

    B)  \[\tau =(m{{v}^{2}}/2)+Fr\]

    C)  \[mvr=I\omega +Fr\]

    D)  \[\frac{L}{R}=RC+t\frac{r}{(1/\sqrt{{{\mu }_{0}}{{\in }_{0}}})}\]

    Correct Answer: C

    Solution :

    mvr and \[I\omega \] has same dimensions \[[M{{L}^{2}}{{T}^{-1}}]\], while Fr has dimensions \[[M{{L}^{2}}{{T}^{-2}}].\]


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