The potential energy of a particle in a force field is U = r 2 A − r B , where A and B are positive constants and r is the distance of particle from the centre of the field. For stable equilibrium

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The potential energy of a particle in a force field is U = r 2 A ​ − r B ​ , where A and B are positive constants and r is the distance of particle from the centre of the field. For stable equilibrium, the distance of the particle isNEET 2012 (Screening)

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Given, the potential energy of a particle in a force field U = r 2 A ​ − r 1 B ​ For stable equilibrium, F = − d r d U ​ = 0 0 = − r 3 2 A ​ + r 2 B ​ or r 2 A ​ = B The distance of particle from the centre of the field r = B 2 A ​

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