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A Cu wire of cross sectional area `1mm^2` is carying current 0.21A. What is the drift velocity of the free ejectrons in the wire?. Electron density of `Cu = 8.4xx10^28/m^3`.

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A copper wire of cross-sectional area 1 mm^2 carries a current of 0.21A Find the drift velocity of free electrons. Given density of free electrons in copper =8.84 times 10^(24)m^-3 and electronic charge e=1.6 times 10^-19 C .

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