Estimate the average drift speed of conduction electrons in copper wire of cross sectional area 10-7 m2 carrying a current of 1.5 A. Assume the density of conduction electrons to be 9 x 1028 m-3 and charge on electron to be 1.6 x 10-19 C.
Answer & explanation
Correct answer: option 1
I = neAvd
vd = I/neA = 10-3 m s-1