What you’ll learn4 learning objectivesChoose one objective for a focused lesson, or study the complete topic.18.5.1Electric potential at a point as the work done per unit positive charge in• define electric potential at a point as the work done per unit positive charge in bringing a small test charge from infinity to the pointSyllabus objective18.5.2The fact that the electric field at a point is equal to the negative of• recall and use the fact that the electric field at a point is equal to the negative of potential gradient at that pointSyllabus objective18.5.3V = Q / (4πε0 r) for the electric potential in the field due to a point• use V = Q / (4πε0 r) for the electric potential in the field due to a point chargeSyllabus objective18.5.4The concept of electric potential leads to the electric potential energy of• understand how the concept of electric potential leads to the electric potential energy of two point charges and use EP = Qq / (4πε0 r)Syllabus objective