Find the approximate total distance traveled by an electron in the time interval in which its displacement in one meter along the wire.

Explanation

Time taken to travel length of the wire is
`("displacement")/("drift velocity") = (S)/(V_d)`
So, `V_d 1 mms^(-1) = 10^(-3) ms^(-1)` (normally the value of drift velocity is 1mm `s^(-1)`
and `S = 1m`
`rArr t = (1)/(10^(-3) = 10^3 s`
As `"distance travelled" = "speed "xx" time"`, so speed `= 10^6 ms^(-1)` (The speed of an electron between two successive collision is around `10^6ms^(-1)`). So required distance is `10^6 xx10^3m = 10^9m.`