BOOK: "Computational Physics", 2nd edition, by Nicholas Giordano and Hisao Nakanishi

The problem is similar to Ex.5.7 in the textbook.

PLEASE CODE A, B, C, AND D correctly

Poisson Equation for Electric Dipole Write a PYTHON program to numerically calculate the potential of an electric dipole, i.e., two opposite point charges, Q/co = 12, separated by a distance a=1 around the origin (e.g., at x = 10.5, y=z=0). Solve the 3D Poisson equation in Cartesian coordinates but impose spherical boundary conditions, V(R)=0, at a large distance R=20 or so. (a) Starting from an initial condition of zero potential use the Jacobi relaxation algorithm with appropriate numerical tolerance and grid density to obtain the (converged) solution. Plot the equipotential lines, as well as V(r) for x=y=z. (b) Compute the magnitude of the electric field, [E(r) | (r: distance from dipole center) along the x=y=z-axis and extract the exponent n for the large-distance behavior, E(r) o ran for large r, through an eyeball fit. Do you find the theoretically expected n-value for the dipole? (c) Investigate how the number of required iteration steps, Niter, increases with reducing the tolerance (error) limit, "tol", and plot Niter(tol). d) Write a program by modifying the algorithm using the Simultaneous Over Relaxation (SOR) method, and study the convergence behavior for varying grid density (fixed total size) in different relaxation runs, focusing on the 2D problem in the x-y plane (for which the optimal value of a is close to 2). For fixed point-by-point accuracy in the solution (not total tolerance!), investigate (and plot) how the number of iteration steps, Niter, depends on the number n=nx=ny of grid points. Do you find the expected behavior of Niter o n2 and Niter on, for the Jacobi and SOR method, respectively