Electric potential

What the syllabus asks of you

• define electric potential at a point as the work done per unit positive charge in bringing a small test charge from infinity to the point
• recall and use the fact that the electric field at a point is equal to the negative of potential gradient at that point
• use V = Q / (4πε0r) for the electric potential in the field due to a point charge
• understand how the concept of electric potential leads to the electric potential energy of two point charges and use EP = Qq / (4πε0 r)