A small test charge is released at rest at a point in an electrostatic field configuration. Will it travel along the field line passing through that point ?

Explanation

Electric field lines give the direction of acceleration of +ve charge. If the electric field line is linear then the test charge will move along the line. If the field line is a curve (non-linear line), the charge will not move along the line. In other words, an electric field line gives the direction of electric field (or furce or acceleraliun) bul does not necessarily predicts the direction of motion (i.e., direction of velocity).