A) \[1.25\times {{10}^{3}}\,\,m/s\]
B) \[2.50\times {{10}^{-3}}\,\,m/s\]
C) \[25.0\times {{10}^{-3}}\,\,m/s\]
D) \[250\times {{10}^{-3}}\,\,m/s\]
Correct Answer: B
Solution :
The relation between drift velocity \[{{v}_{d}}\] and current \[i\] are related as given by \[i=A\,\,ne\,\,{{v}_{d}}\], So, \[{{v}_{d}}=\frac{i}{A\,\,ne}\] \[{{v}_{d}}=\frac{40}{{{10}^{-6}}\times 1.6\times {{10}^{-19}}\times {{10}^{29}}}\] \[=\frac{40}{16}\times {{10}^{-3}}\,\,m/s\] \[=2.5\times {{10}^{-3}}\,\,m/s\]You need to login to perform this action.
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