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An electric dipole of moment pp→ is placed normal to the lines of force of electric intensity EE→, then the work done in deflecting it through an angle of 180° is: -

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Question

An electric dipole of moment `vec"p"` is placed normal to the lines of force of electric intensity `vec"E"`, then the work done in deflecting it through an angle of 180° is:

Options

  • pE

  • +2pE

  • −2pE

  • zero

MCQ

Solution

zero

Explanation:

W = PE(cos 90° − cos 270°) = 0

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