Question

Question #78d38

Answer 1

(d) Zero

Explanation:

Newton's First Law of motion: An object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.

Even though the `color (blue)"text of the question appears ambiguous"`, still the bottom line is "A positive charge........is at rest in an electric field".
`=>` Net force on the charge is zero, as it is at rest.

So far as force `vec F` due to Electric field `vec E` is concerned, it will be in the direction of the field.

`vecF=q*vecE`
as it is positive charge.

Since it is given that the charge is at rest in an electric field, it appears that force due to electric field is equal and opposite to the force of gravity.