Part A A rectangular block of metal of resistivity p has dimensions d x 2d x 3d. A potential difference V is to be applied between two opposite faces of the block. To which two faces of the block should the potential difference be applied to give the maximum current density? View Available Hint(s) to the faces that are a distance d apart to the faces that are a distance 2d apart to the faces that are a distance 3d apart Submit Part B Complete previous part(s) Part C To which two faces of the block should the potential difference be applied to give the maximum current? View Available Hint(s) to the faces that are a distance d apart to the faces that are a distance 2d apart to the faces that are a distance 3d apart Submit Part D Complete previous part(s)