817. 1 Electrical potential energy and electric potential Define the electric potential difference ∫E.d=vr-H1)=-( PE PE V -V=lE.dr OThe electric potential is not same thing as the electric potential energy Electric potential is a property of a point in space, whether or not a charge is placed at that point. It can be positive, negative or zero 817.1 Electrical potential energy and electric potential @In PE=gV, pe depends on both the sign of q and the sign of v at the point where q is placed; @the electric potential and the electric potential energy are scalar quantities. @The place where the electric potential and the electric potential energy is set to zero is arbitrary, we can choose it anywhere we like for a finite charge distribution The unit of the electric potential: volt(v=J/C3 Define the electric potential difference d ( ) ( ) f i q PE q PE E r V V i f ⋅ = − f − i = − − ∫ r r ∫ − = ⋅ f i V V E dr i f r r or Note: 1The electric potential is not same thing as the electric potential energy.Electric potential is a property of a point in space, whether or not a charge is placed at that point. It can be positive, negative or zero. §17.1 Electrical potential energy and electric potential 2In PE=qV, PE depends on both the sign of q and the sign of V at the point where q is placed; 3the electric potential and the electric potential energy are scalar quantities. 4The place where the electric potential and the electric potential energy is set to zero is arbitrary, we can choose it anywhere we like for a finite charge distribution. The unit of the electric potential: volt(v)=J/C §17.1 Electrical potential energy and electric potential