An electric dipole of dipole moment p → is placed in a uniform electric field E → such that p → is perpendicular to E → . The work done to turn the dipole through an angle of 180 o is

Question

An electric dipole of dipole moment p → is placed in a uniform electric field E → such that p → is perpendicular to E → . The work done to turn the dipole through an angle of 180 o is, zero, p E, 2 p E, 2 p E

MARKS App · Accepted Answer

W = U f - U i W = - p E cos 270 ° - - p E cos 90 ° W = 0

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