question_answer

There is a current of 1.344 amp in a copper wire whose area of cross-section normal to the length of the wire is 1\[m{{m}^{2}}\]. If the number of free electrons per \[c{{m}^{3}}\] is \[8.4\times {{10}^{22}}\], then the drift velocity would be                                                                          [CPMT 1990]

A)                    1.0\[mm/sec\]            

B)            1.0\[m/sec\]

C)                    0.1\[mm/sec\]            

D)            0.01\[mm/sec\]