B) Material
C) Length
D) Cross Section Area
If the asked, "What does the resistance of a wire depend on?" the correct answer would be all ot the above. However they did not ask about "resistance" instead "resistivity" which is a material property.
The correct answer:
B) Material
Other answer is totally wrong. Resistance depends on all those factors, but
resistivity depends only on material (B)
Absolutely all three matter!
Gold wire conducts better than anything, copper better than aluminum.
Length matters. Longer wire = more resistance
Cross section matters. How big the wire is affects overall resistance and the amount of current it can carry.
B. The best conductors are silver, copper, aluminum, brass and steel.
A) None of these
B) Material
C) Length
D) Cross Section Area
