First slide
Potential Energy of dipole in external field
Question

A short electric dipole has a dipole moment of  16×109Cm. The electric potential due to the dipole at a point at a distance of 0.6 m from the centre of the dipole, situated on a line making an angle of 60o with the dipole axis is : 14πε0=9×109Nm2/C2

Easy
Solution

V=Kpcosθr2=9×109×16×109×12×0.36=9×162×0.36=9×162×36=200V

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