Current Electricity and Electrical InstrumentHard
Question
There are 8.4 × 1022 free electrons per cm3 in copper. The current in the wire is 0.21 A (e = 1.6 × 10-19 C). Then the drifts velocity of electrons in a copper wire of 1 mm2 cross section, will be :-
Options
A.2.12 × 10−5 m/s
B.0.78 × 10−5 m/s
C.1.56 × 10−5 m/s
D.none of these
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