Potential energy stored in dipole ?
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Posted by Jitendra Raj 4 years, 11 months ago
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Meghna Thapar 4 years, 11 months ago
We derived the expression of potential energy in terms of the angle made by the direction of the electric dipole moment and the direction of the external uniform electric field. We found that the potential energy is the negative of the dot product of dipole moment and the electric field.
The potential energy of interaction between dipoles is given by,
V=−4πϵ0r32P1P2
Here the dipole P1 is inclined to the dipole P2 at an angle θ,since the vertical component of P1 is perpendicular to P2 is zero i.e. P1sinθ is zero, taking horizontal component of P1 along P2 i.e. P1cosθ we get
V=−4πϵ0r32P1P2cosθ
V=−r32kP1P2cosθ..........(since, k=4πϵ01)
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