Question

Estimate the average drift speed of conduction electrons in a copper wire of cross-sectional area 2.5 × 10−7 m2 carrying a current of 1.8 A. Assume the density of conduction electrons to be 9 × 1028 m−3.

Answer 1

We know that drift velocity, Vd = I/nq *A I is the current, n is charge density, q is charge of electron and A is cross-sectionVd= i/nq x A

Vd= 1.8/ 9x1028 x 1.6x 10-19x 2.5x10-7

Vd= 5x 10-4 m/s

Here n should be 9x 10^28 m^-3

Answer 2

Answer:

See attachment mate

Hope its help you