Answer to Question #59042 in Electric Circuits for Emmanuel

Question

The average velocity of the electrons in a piece of wire of cross-sectional area
2.0×10−6m2
2.0×10−6m2
is
2.5×10−4m/s
2.5×10−4m/s
when a steady current of 4.0 A is flowing. Calculate the number of free electrons per unit volume of the material

3×1019
3×1019

5×1020
5×1020

2×1023
2×1023

5×1028
5×1028