JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Electric Dipole

  • question_answer
    An electric dipole consisting of two opposite charges of \[2\times {{10}^{-6}}C\] each separated by a distance of \[3\,cm\] is placed in an electric field of \[2\times {{10}^{5}}\] N/C. The maximum torque on the dipole will be                                                                 [MP PMT 1987]

    A)                    \[12\times {{10}^{-1}}N\,m\]

    B)                                      \[12\times {{10}^{-3}}N\,m\]

    C)                    \[24\times {{10}^{-1}}N\,m\]

    D)                                      \[24\times {{10}^{-3}}N\,m\]

    Correct Answer: B

    Solution :

                        Maximum torque = pE \[=\text{ 2}\times \text{1}{{0}^{\text{6}}}\times \text{3}\times \text{1}{{0}^{\text{2}}}\times \text{2}\times \text{1}{{0}^{\text{5}}}=\text{ 12}\times \text{1}{{0}^{\text{3}}}N-m\].


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