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J & K CET Medical J & K - CET Medical Solved Paper-2009

  • question_answer
    Electric flux emanating through a surface element \[d\vec{s}=5\hat{i}\] placed in an electric field \[\vec{E}=4\hat{i}+4\hat{j}+4\hat{k}\]is

    A)  10 units                              

    B)  20 units

    C)  4 units                                 

    D)  16 units

    Correct Answer: B

    Solution :

                     Electric flux \[\phi =\overrightarrow{E}.\overrightarrow{ds}\] \[\therefore \]  \[\phi =(4\hat{i}+4\hat{j}+4\hat{k})(5\hat{i})\] \[=20\text{ }units\]


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