Consider a wire having current 10A having area of cross-section 1 cm². If number of electrons per unit volume is $9\times {10}^{28}{\mathrm{m}}^{-3}$. Find the drift velocity of electrons:

• A

  $6.94\times {10}^{-6}{\mathrm{ms}}^{-1}$

• B

  $1.94\times {10}^{-3}{\mathrm{ms}}^{-1}$

• C

  $5.94\times {10}^{-2}{\mathrm{ms}}^{-}$

• D

  $2.94\times {10}^{-4}{\mathrm{ms}}^{-1}$