Electrostatics: JEE Main 2020 Physics question

JEE Main 2020 · 6 Sep, Evening shift · Q6944

JEE Main 20206 Sep, Evening shiftPhysicsMediumElectrostatics167× since 2002

Two identical electric point dipoles have dipole moments

{\overrightarrow p _1} = p\widehat i

and

{\overrightarrow p _2} = - p\widehat i

and are held on the x axis at distance '

a

' from each other. When released, they move along the x-axis with the direction of their dipole moments remaining unchanged. If the mass of each dipole is 'm', their speed when they are infinitely far apart is :

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