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An electric dipole consisting of charges $+q$ and $-q$ separated by a distance $L$ is in stable equilibrium in a uniform electric field
$\vec{E}$ . The electrostatic potential energy of the dipole is
Option: 1 $qLE$
Option: 2 $zero$
Option: 3 $-qEL$
Option: 4 $-2\; qEL$

Answers (1)

The potential energy of the dipole

$\\U=-pEcos\theta$

At stable equilibrium

$\\\theta=0^0\\U=-pEcos0=-pE=-qLE$

Posted by

Safeer PP

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