A dipole is kept near an infinite line of charge. If the net force on the dipole is zero, then its dipolse moment is

Options

A. parallel to the line of charge
B. along the perpendicular drawn from the dipole to the line of charge
C. along the normal to the plane formed by the above two lines
D. net force onn a dipole kept near an infinte line of charge can never be zero

Answer

A

Explanation

Electric field is same in direction and magnitude at the position of both changes only in this case.