Question

a proton is placed in a uniform electric field directed along positive x axis .in which direction will it tend to move?

Answer 1

A uniform Electric field is directed parallel to and in the direction of the positive x-axis.

A proton is placed some where in the x y plane.

Since, a proton is positively charged, the force on it due to the field $\vec{E}$ will be in the direction parallel to x - axis  , from the point where the proton is placed.

       $\vec{Force} = q\ \vec{E} = e\ E\ \hat{i}$

   e = q = electric charge of a proton
   So direction of Force is same as the direction of electric field.

Answer 2

Answer:

from +ve x-axis to -ve ..........