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JEE Main202125 Feb 2021Morning ShiftPhysicsWork, Power and EnergyActual

The potential energy U of a diatomic molecule is a function dependent on r (interatomic distance) as U = α r 10 - β r 5 - 3 where, α and β are positive constants. The equilibrium distance between two atoms will be 2 α β a b , where a = ______ .

Correct answer

0

Step-by-step solution

For equilibrium d U d r = 0 - 10 α r 11 + 5 β r 6 = 0 5 β r 6 = 10 α r 11 r 5 = 2 α β r 5 = 2 α β r = 2 α β 1 5 a = 1

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