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  • Can someone explain An electric dipole when placed in a uniform electric field Ewill have minimum potential energy, if the positive direction of dipole moment makes the following angle with E

An electric dipole when placed in a uniform electric field  E will have minimum potential energy, if the positive direction of dipole moment makes the following angle with E

  • Option 1)

    \pi

  • Option 2)

    \pi/2

  • Option 3)

    zero

  • Option 4)

    3\pi/2

 

Answers (1)

As we have learned

Torque Experienced by the dipole -

\vec{\tau }=\vec{P}\times \vec{E}

\vec{\tau }=PE\sin \Theta

\Theta =0^{\circ}    \tau =0

\Theta =\frac{\pi }{2}             \tau = max^{m}

- wherein

 

 

 Potential energy = –  pE cosq

When q = 0. Potential energy = – pE (minimum)

 


Option 1)

\pi

Option 2)

\pi/2

Option 3)

zero

Option 4)

3\pi/2

Posted by

Vakul

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