Estimate the average drift speed of conduction electrons in a copper wire of cross sectional area 1 x 10-7 m2, - Science - Electricity

Question

Estimate the average drift speed of conduction electrons in a
copper wire of cross sectional area 1 x 10-7
m2, carrying a current of 1 5 A Assume that each copper
atom contributes roughly one conduction electron The no of copper
atoms per cubic metre is 8 5 x 1028

Kranav Sharma · Accepted Answer

Drift speed is

v = I/n A e

Where
I = current
n = number of free electrons
A = cross sectional area of the
conductor
e = electronic charge
so,
v = 1 5 / (8 5 x 1028x 10-7 x 1 6 x
10-19)

= 1 10 x 10-3 m/s

Estimate the average drift speed of conduction electrons in a copper wire of cross sectional area 1 x 10-7 m2, carrying a current of 1.5 A.Assume that each copper atom contributes roughly one conduction electron . The no. of copper atoms per cubic metre is 8.5 x 1028.

Estimate the average drift speed of conduction electrons in a copper wire of cross sectional area 1 x 10^-7 m², carrying a current of 1.5 A.Assume that each copper atom contributes roughly one conduction electron . The no. of copper atoms per cubic metre is 8.5 x 10²⁸.