This was the solution to problem 4.30 in Griffiths 'Introduction to electrodynamics ' .
In it he asks ' An electric dipole p, pointing in the y direction, is placed midway between two large conducting plates, as shown . Each plate makes a small angle θ with respect to the x axis, and they are maintained at potentials ±V . What is the direction of the net force on p? '
While I understand his solution, I have a problem with the way he's drawn the field lines . They curl around . While I believe that all electric fields should have zero curl . Even with Stokes theorem the closed loop integral for this would be non zero according to the figure .
Where am I going wrong in my analysis ?