An electric dipole with charges $+q$ and $-q$ is placed in a uniform electric field $E$. What is the net force $F_{\text{net}}$ acting on the dipole?

In a uniform electric field, the force on the positive charge is $F_{+}=qE$ and the force on the negative charge is $F_{-}=-qE$. Since these forces are equal in magnitude and opposite in direction, their vector sum $$\begin{array}{rl}{F}_{\text{net}}& =F_{+}+F_{-}\\ & =0\end{array}$$.