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NEET 1998 (AIPMT) · Electric Dipole

Electric Dipole question from NEET 1998 (AIPMT)

Q78NEET 1998 · AIPMTEasy

Electric Dipole

A point $Q$ lies on the perpendicular bisector of an electrical dipole of dipole moment $p$ . If the distance of $Q$ from the dipole is $r$ (much larger than the size of the dipole) then electric field at $Q$ is proportional to

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Answer: (d)

On the perpendicular bisector (equatorial line): $E = \frac{1}{4\pi\varepsilon_0}\frac{p}{r^3}$
So $E \propto p$ and $E \propto r^{-3}$ , answer (d).

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