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Explain the position (orientations) of a dipole in stable equilibrium, unstable equilibrium. |
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Answer» Solution :The potential energy of a DIPOLE place in uniform electric field, `U = -VECP.vecE=-pEcos THETA` where `theta ` is an angle between `vecp` and `vecE` . (i) If ` vecp||vecEimplies theta=0^(@)` `:.` U = -pE is the stable equilibrium STATE of a pole . (ii) If `vecp ||(-vecE)implies theta=180^(@)` `:.` U = pE is the maximum value of potential energy which indicates unstable equilibrium state ofa dipole. (III) If `vecP bot vecEimplies theta= 90^(@)` `:.` U=0 which indicates maximum unstabl equilibrium state of a dipole. |
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