817.2 The calculation of the electric potential 2. The electric potential of a collection of pointlike charges The total electric potential is the algebraic scalar sum of the potential s of each charges V=V1+V2+V3 十 十 十 4兀Enr14znr,4 3. The electric potential of continuous charge distributions of finite size do dv= V= itor 4Te. Distr.r 817.2 The calculation of the electric potential XXThe second method of calculating the electric potential do do d=-p= 4 兀Ear 47e distr. r Note This method can be applied only to the finite charge distribution. If the charge distribution is infinite, we must use the integral of the electric field as in the definition of the electric potentiaL. lel:P77317.2 Example 2: P773173 66 2. The electric potential of a collection of pointlike charges The total electric potential is the algebraic scalar sum of the potential s of each charges. L L = + + + = + + + 0 3 3 0 2 2 0 1 1 1 2 3 4 4 4 r Q r Q r Q V V V V πε πε πε 3. The electric potential of continuous charge distributions of finite size ∫ = = distr. charge 0 0 d 4 1 4 d d r Q V r Q V πε πε §17.2 The calculation of the electric potential Note: This method can be applied only to the finite charge distribution. If the charge distribution is infinite, we must use the integral of the electric field as in the definition of the electric potential. Example 1: P773 17.2 Example 2: P773 17.3 ※The second method of calculating the electric potential ∫ = = distr. charge 0 0 d 4 1 4 d d r Q V r Q V πε πε §17.2 The calculation of the electric potential