There is a current of \( 1.344 \mathrm{~A} \) in a copper wire whose area of cross-section norma...

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There is a current of \( 1.344 \mathrm{~A} \) in a copper wire whose area of cross-section normal to the length of the wire is \( 1 \mathrm{~mm}^{2} \). If the number of free electrons per \( \mathrm{cm}^{3} \) is \( 8.4 \times 10^{22} \), then the drift velocity would be
(A) \( 1.0 \mathrm{~mm} / \mathrm{s} \)
(B) \( 1.0 \mathrm{~m} / \mathrm{s} \)
(C) \( 0.1 \mathrm{~mm} / \mathrm{s} \)
(D) \( 0.01 \mathrm{~mm} / \mathrm{s} \)
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