Assume that each atom of copper contributes one free electron. If the current flowing through a copper wire of 1 mm diameter is 1.1 A, the drift velocity of electrons will be (density of Cu = 9 gm/cm3, At. wt. of Cu = 63)
1
0.3 mm/s
2
0.5 mm/s
3
0.1 mm/s
4
0.2 mm/s