Question

An uniform copper wire of length 1m and cross sectional area 0.5mm² carries a current of 1A . Assuming that there are 8*10^²²per cm³ in cu copper wire How long will electron that to drift from one end of the wire the other end.​

Answer 1

Answer:

we know

I = enAvd

1 = (1.6 * $10^{-19}$)n (.5*$10^{-6}$)($10^{-7}$)(8*$10^{16}$)

n=10^16 / 6.4 = 1.56 *10^15

Explanation: