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NEET Sample Paper NEET Sample Test Paper-92

  • question_answer
    Let \[{{E}_{a}}\] be the electric field due to a dipole in its axial plane distant \[\ell \] and \[{{E}_{q}}\] be the field in the equatorial plane distant \[\ell ',\] then the relation between \[{{E}_{a}}\] and \[{{E}_{q}}\] will be

    A) \[{{E}_{a}}=4{{E}_{q}}\]       

    B)        \[{{E}_{q}}=2{{E}_{a}}\]

    C) \[{{E}_{a}}=2{{E}_{q}}\]       

    D)        \[{{E}_{q}}=3{{E}_{a}}\]

    Correct Answer: C

    Solution :

    [c]  We know that for short dipole, field at axial point, \[{{E}_{a}}=\frac{2p}{{{d}^{3}}}\] and field at equatorial point, \[{{E}_{q}}=\frac{p}{{{d}^{3}}}\] So, \[{{E}_{a}}=2{{E}_{q}}\]


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