RAJASTHAN ­ PET Rajasthan PET Solved Paper-2011

  • question_answer
    The electric field due to an infinitely long thin wire at a distance R varies as

    A)  1/R             

    B)  \[1/{{R}^{2}}\]

    C)  R               

    D) \[{{R}^{2}}\]

    Correct Answer: A

    Solution :

     We knows \[E=\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{2\lambda }{R}\] Hence           \[E\propto \frac{1}{R}\]


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