91影视

Force that is exerted on charged particles is,

$\mathrm{F}鈨�=\mathrm{qE}鈨�$

Solve for acceleration,

$\begin{array}{l}{\mathrm{m}}^{\mathrm{a}}\mathrm{a}={\mathrm{q}}_{\mathrm{E}}^{\mathrm{E}}\\ \frac{\mathrm{a}}{=}\frac{\mathrm{qE}}{\mathrm{m}}\end{array}$

The direction of the acceleration of the particle is the same as the electric field. So, for positively charged particle, the trajectory is parallel to electric field line.

The field lines emanating from the positive charge is constant and thus the force exerted produces constant acceleration. Thus, the trajectory does follow the electric field lines.

The direction of force exerted on a charged particle is the same as the direction of electric field lines.

In between two charges, in fig (b), the direction of field line is tangential to the curves of the lines. So, the trajectory is tangential to the curved lines not following the electric field lines.