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

Explanation

`"time"=("displacement")/("drift velocity")=S/V_(d)`
`therefore V_(d)=1 mm//s=10^(-3)m//s` (normally the value of drift velocity is 1 mm/s)
S = 1 m
`"time "=1/(10^(-3))=10^(3)S`
`"Distance travelled "= "speed"xx"time speed"=10^(6)m//s`
`"So required distance "=10^(6)xx10^(9)m`