Find the drift velocity of electrons in a metal conductor having density of conduction electrons $9 × 10^{28} m^{-3}$ of cross sectional area $2× 10^{-7} m^2$ carrying 2 A current:

0.7 mm/s 1.1 mm/s 7.0 mm/s 11 mm/s

0.7 mm/s

The correct answer is Option (1) → 0.7 mm/s