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Work done to turn a dipole through 180 degrees from alignment with a uniform field

This type of question, asked 3 times: 8 Apr 2023, 23 Jan 2025, 28 Jan 2025. All 3 questions below, oldest first.

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  1. Question 1

    8 Apr 2023

    21
    An electric dipole of dipole moment is 6.0×10−6Cm6.0 \times10^{- 6}Cm placed in a uniform electric field of 1.5×103NC−11.5 \times10^{3}NC^{- 1} in such a way that dipole moment is along electric field. The work done in rotating dipole by 180∘180^{\circ} in this field will be___ mJmJ

  2. Question 2

    23 Jan 2025

    86
    Two point charges −4μc- 4\mu c and 4μc4\mu c, constituting an electric dipole, are placed at (−9,0,0)cm( - 9,0,0)cm and (9,0,0)cm(9,0,0)cm in a uniform electric field of strength 104NC−110^{4}NC^{- 1}. The work done on the dipole in rotating it from the equilibrium through 180∘180^{\circ} is :

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  3. Question 3

    28 Jan 2025

    97
    An electric dipole of dipole moment 6×10−6Cm6 \times10^{- 6}Cm is placed in uniform electric field of magnitude 106 V/m10^{6}\text{ }V/m. Initially, the dipole moment is parallel to electric field. The work that needs to be done on the dipole to make its dipole moment opposite to the field, will be _____\_\_\_\_\_ J.