An electric dipole is in stable equilibrium in an electric field , then *
(a) its electric dipole moment is parallel to applied electric field.
(b) its electric dipole moment is anti-parallel to applied electric field.
(c) its electric dipole moment is perpendicular to applied electric field.
(d) all of the above
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(1)When the dipole is aligned parallel to the electric field (i.e. the angle between dipole moment and the electric field is 0
o
), then the dipole is in stable equilibrium.
(2)When the dipole is aligned anti-parallel to the electric field (i.e. the angle between dipole moment and the electric field is 180
o
), then the dipole is in unstable equilibrium.
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