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NEET Sample Paper NEET Sample Test Paper-28

  • question_answer
    The electric field in a region is given by \[\vec{E}=a\hat{i}+b\hat{j}\] . Here a and b are constant. The net flux passing through a square area of side \[\ell \] parallel to y-z plane will be :-

    A)  \[a{{\ell }^{2}}\]               

    B)  \[b{{\ell }^{2}}\]

    C)  \[\sqrt{{{a}^{2}}+{{b}^{2}}}{{\ell }^{2}}\]             

    D)  \[\left( {{a}^{2}}+{{b}^{2}} \right){{\ell }^{2}}\]

    Correct Answer: A

    Solution :

    \[\vec{A}={{\ell }^{2}}\hat{i}\] \[\phi =\vec{B}.\vec{A}=(ai+b\hat{j}).({{\ell }^{2}}\hat{i})={{\ell }^{2}}a\]           


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