Every atom makes one free electron in copper. If 1.1 ampere current is flowing in the wire of copper having 1 mm diameter, then the drift velocity (approx.) will be (Density of copper \[=9\times {{10}^{3}}\,kg\,{{m}^{-3}}\] and atomic weight = 63) [CPMT 1989]

• A.                    \[0.3\,mm/\sec \]      
• B.            \[0.1\,mm/\sec \]
• C.                    \[0.2\,mm/\sec \]      
• D.                    \[0.2\,cm/\sec \]