A copper wire of $3 \mathrm{m}{\mathrm{m}}^2$ cross-sectional area carries a current $5 \mathrm{A}$. The magnitude of the drift velocity for the electrons in the wire is (Assume each copper atom contributes one free electron and density of copper $=8920 \mathrm{kg} {\mathrm{m}}^{-3}$, $M_{\mathrm{Cu}}=63.5 \mathrm{kg} {\mathrm{mol}}^{-1}$)

• A

  $0.24 \mathrm{m} {\mathrm{s}}^{-1}$
• Correct answer
  B

  $0.12 \mathrm{m} {\mathrm{s}}^{-1}$
• C

  $\mathrm{}2.4 \mathrm{m} {\mathrm{s}}^{-1}$
• D

  $0.06 \mathrm{m} {\mathrm{s}}^{-1}$

Hence, the correct answer is option: 'B'.