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An electric dipole of moment `vecp` is placed normal to the lines of force of electric intensity `vecE`, then the work done in deflecting it through a

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An electric dipole of moment `vecp` is placed normal to the lines of force of electric intensity `vecE`, then the work done in deflecting it through an angle of `180^(@)` is
A. `pE`
B. `+2pE`
C. `-2pE`
D. Zero
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Correct Answer - D
Work done `= int_(90)^(270) pE sin theta d theta = [-pE cos theta]_(90)^(270) = 0`
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