Force on a dipole in a uniform electric field

[hidemi]

Homework Statement

The force exerted by a uniform electric field on a dipole is:
A. parallel to the dipole moment
B. perpendicular to the dipole moment
C. parallel to the electric field
D. perpendicular to the electric field
E. none of the above

The answer is E.

Relevant Equations

F = qE

I think the answe should be C as shown in the attachment.

 

[mitochan]

C:The forces acting on charges are parallel to the electric field.
E:They add up to zero though torque acts on the dipole.
If you understand them you do not have to worry about the "right" answer.

 

[haruspex]

It asks for "force", singular, so take that to mean net force.

 

[hidemi]

Thank you all.