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JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Self Evaluation Test - Electric Chages and Fields

  • question_answer
    A surface has the area vector \[\vec{A}=\left( 2\hat{i}+3\hat{j} \right){{m}^{2}}.\] The flux of an electric field through it if the field is \[\vec{E}=4\hat{i}\frac{V}{m}:\]

    A) 8V-m   

    B)        12Vm

    C) 20V-m  

    D)        zero

    Correct Answer: A

    Solution :

    [a] \[\phi =\vec{E}.\text{ }\vec{A}=4\hat{i}.\left( 2\hat{i}+3\hat{j} \right)=8V-m\]


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