Maximum Current and Current Density in a Cuboidal Resistor A rectangular block of metal of resistivity has dimensions d$2$d$3$dd$2$d$3$d$.$ A potential difference VV is to be applied between two opposite faces of the block.

Part A To which two faces of the block should the potential difference be applied to give the maximum current density? to the faces that are a distance dd apart

to the faces that are a distance $2$d$2$d apart

to the faces that are a distance $3$d$3$d apart