Electric potential probelm!! HELP PLEASE TEST TMRW! Two uniformly charged spherical shells of radii R and 2R with identical surface charge densities σ are along the x-axis. The surface of each of the spheres is located a distance R from the origin O Define the potential at ∞ to be zero. Along the x-axis are two locations A and B that are R/2 from the Origin (O). A) What is the potential at A? B) What is the potential at B? C) Work required by external foce to move a charge q from A to B? D) Where between the spheres and along x-axis is the potential the minimum? Can someone explain this problem to be conceptually on what is going on because i dont uderstand. this is what i have done so far A) V = Kq / R ----> q = σ x 4πr2 and distance r = R/2 so VA = 2K(σ x 4π(R)2) / R B) is the potential at B the same as the potential at A except for the radius is 2R instead of R? VB = 2K(σ x 4π(2R)2) / R c)W = qΔV ΔV = answer to B - answer to A = VA = 2K(σ x 4π(3R)2) / R ??? D)what does this mean??? potential the minimum???! also my teacher did not provide me with a picture or any diagram so i'm kinda visualizing it in my head. HELP ME PLEASE!