An electric dipole is placed in a uniform electric field with its type

1.	An electric dipole is placed in a uniform electric field with its type of movement parallel to the field. Find: (I) The work done in turning the dipole till its dipole moment points in the direction opposite to E.(2) The orientation at dipole for which the torque acting on it becomes maximum.
Answer» Work done by external agent in rotating the dipole W = PE [cosθ₁ - cosθ₂] then W = PE [cos 0° - cos 180°] W = PE [1 - (-1)] W = 2PE t = rF sinθ t = rF sin 0° t = 0

An electric dipole is placed in a uniform electric field with its type of movement parallel to the field. Find: (I) The work done in turning the dipole till its dipole moment points in the direction opposite to E.(2) The orientation at dipole for which the torque acting on it becomes maximum.

Answer»

Work done by external agent in rotating the dipole

W = PE [cosθ₁ - cosθ₂]

then

W = PE [cos 0° - cos 180°]

W = PE [1 - (-1)]

W = 2PE

t = rF sinθ

t = rF sin 0°

t = 0

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An electric dipole is placed in a uniform electric field with its type of movement parallel to the field. Find: (I) The work done in turning the dipole till its dipole moment points in the direction opposite to E.(2) The orientation at dipole for which the torque acting on it becomes maximum.

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