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NEET Sample Paper NEET Sample Test Paper-49

  • question_answer
    Two electric dipoles of moment p and 64p are placed in opposite direction on a line at a distance of 25 cm. The electric field will be zero at a point between the dipoles whose distance from the dipole of moment p is-

    A) 5 cm                

    B) \[\frac{25}{9}\] cm

    C) 10 cm              

    D) \[\frac{4}{13}\] cm

    Correct Answer: A

    Solution :

    \[p{{\overset{x}{\longleftrightarrow}}^{\bullet }}\overset{25-x}{\longleftrightarrow}\,\,64p\] \[\frac{2kp}{{{x}^{3}}}\,=\,\frac{2k(64p)}{{{(25-x)}^{3}}}\]


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