[Drift velocity] Factors affecting velocity

[Deathnote777]

1. Is the charge density (No. of charges/volume) constant for a specific material ? e.g. Copper has a constant charge density no matter how big it is ?

2. Why someone told me that increasing the cross-sectional area of a wire will not affect its drift velocity ? The resistance will be reduced and the electrons can move faster, isn't it ?

 

[ZapperZ]

You need to learn the difference between "resistance" and "resistivity". This is the same as the issue between "mass" and "density". One requires the knowledge of a volume of the object, the other doesn't.

Zz.