Final answer:
The voltage drop in conductors made of PVC carrying alternating current would be less than that of aluminum because aluminum has a higher resistivity than copper, which has lower resistivity and is more commonly used for electrical wiring.
Step-by-step explanation:
The voltage drop of conductors carrying alternating current in PVC will be less than that of aluminum. This is because when comparing conductivity of various materials, copper is one of the best conductors, followed by silver, which actually has the highest conductivity among common conductive materials. However, due to its high cost, silver is not commonly used. Gold also has good electrical conductivity, but like silver, it is expensive and therefore not typically used for most electrical wiring. On the other hand, aluminum has a higher resistivity than copper, meaning it would have a greater voltage drop for the same size and length of conductor under identical conditions.