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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 mm2. If the number of free electrons per cm3 is 8 × 1022, then the drift velocity would be 

(1) 1.0 mm/sec

(2) 1.0 m/sec

(3) 0.1 mm/sec

(4) 0.01 mm/sec

PMT