AQn electric dipole of dipole movement p is placed in a uniform electric field E.Write the expression for the torque experienced by the dipole.Identify two pairs of perpendicular vectors in an expression.Show diagramatically the orientation of the dipole in the field for which the torque is
(i)Maximum
(ii)Half the maximum value and
(iii)Zero

The torque acting on a dipole placed in an electric field as shown in the diagramis given by,τ = p × E, two perpendicularpair of perpendicular vectors are,1. dipole moment vector and electric field vector.2. torque and electric field vectors.i) when angle θ = 90° between p and E then torque is maximum.ii) when angle θ = 30° between p and E then torque is half of the maximum value.iii) when angle θ = 0° between p and E then torque is zero.This can be visualised from the diadram shown.

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