*** liana draws a diagram to show the direction of the electric force acting on a charged particle in a uniform electric field. which change would make the diagram correct?

When charge is placed in electric field then the force on the positive charge is always in the direction of electric field.

So here the direction of force on this charge must be in the direction of electric field.

So the force vector is towards right direction.

where are the vectors ?

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it