A uniform wire of cross-sectional area 1 mm² has resistance 3 Ω. A voltage difference of 6 V is applied across its two ends. Given that the number of conduction electron per volume of the wire is 1.00×10²⁸ m⁻³, what is the average velocity of electron along the wire?
a) 3×10⁸ m/s
b) 3.1×10⁻³ m/s
c) 3.1×10⁻⁴ m/s
d) 1.3×10⁻³ m/s
e) 1.3×10⁻⁴ m/s