Question

Two electrons are at rest on the x axis. The first is at x =0 and the second is at x = 1 m. What is the direction of the net E-field at the coordinate position (0.5m, 0.5m)?

Answer 1

At that location . . .

-- The horizontal components of the field are in opposite directions, so cancel.

-- The vertical components are in the same direction ... downward ... so add.

The direction of the net E-field at the point (0.5, 0.5) is downward,
toward the point (0.5, 0) .