J & K CET Engineering J and K - CET Engineering Solved Paper-2012

  • question_answer
    There is a point charge q located at the centre of a cube. What is the electric flux of this point charge, through a face of the cube?

    A)  \[\frac{q}{{{\varepsilon }_{0}}}\]

    B)  \[\frac{q}{6{{\varepsilon }_{0}}}\]

    C)  \[\frac{q}{3{{\varepsilon }_{0}}}\]

    D)  It will depend upon the size of the cube

    Correct Answer: B

    Solution :

    According to Gauss's law Electric flux \[\phi =\frac{{{q}_{0}}}{{{\varepsilon }_{0}}}\] Cube is a symmetrical body with 6 faces so electric flux linked with each face


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