When a positive charge moves opposite to the direction of an electric field, the electric field does negative work on the charge. This means that the force exerted by the field and the displacement of the charge are in opposite directions, resulting in negative work done by the field

. Because the field does negative work on the charge, the charge's electric potential energy increases. This occurs because an external agent must do work to move the positive charge against the electric field, and this work is stored as increased potential energy of the charge

. In summary:

• The electric field exerts a force on a positive charge in the direction of the field.
• Moving the positive charge opposite to the field requires work against this force.
• The electric field does negative work on the charge.
• The potential energy of the charge increases as it moves opposite to the electric field.

This behavior is consistent with the concept that positive charges naturally move from regions of higher electric potential to lower electric potential, so moving them against the field corresponds to moving them to higher potential energy