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Every atom makes one free electron in copper. If 1.1 ampere current is flowing in the wire of copper
\( \mathrm{P} \) having \( 1 \mathrm{~mm} \) diameter, then the drift velocity

W (approx.) will be (Density of copper \( =9 \times 10^{3} \mathrm{~kg} \) \( \mathrm{m}^{-3} \) and atomic mass \( =63 \mathrm{~g} / \mathrm{mol} \) )
(A) \( 0.3 \mathrm{~mm} / \mathrm{sec} \)
(B) \( 0.1 \mathrm{~mm} / \mathrm{sec} \)
(C) \( 0.2 \mathrm{~mm} / \mathrm{sec} \)
(D) \( 0.2 \mathrm{~cm} / \mathrm{sec} \)
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