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(C) The potential energy $U$ of an electric dipole in a uniform electric field $E$ is given by the formula $U = -p \cdot E = -pE \cos 	heta$,where $p

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(C) The potential energy $U$ of an electric dipole in a uniform electric field $E$ is given by the formula $U = -p \cdot E = -pE \cos 	heta$,where $p$ is the dipole moment and $	heta$ is the angle between the dipole moment vector and the electric field vector.To find the minimum potential energy,we need to maximize the value of $\cos 	heta$.The maximum value of $\cos 	heta$ is $1$,which occurs when $	heta = 0^{\circ}$ (or zero radians).Substituting $	heta = 0^{\circ}$ into the formula,we get $U_{\min} = -pE \cos(0^{\circ}) = -pE$.Therefore,the potential energy is minimum when the angle between the dipole moment and the electric field is zero.

An electric dipole,when placed in a uniform electric field $E$,will have minimum potential energy when the angle made by the dipole moment with the field $E$ is

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