A) 2I
B) I
C) \[I/2\]
D) \[I/4\]
Correct Answer: C
Solution :
From \[{{v}_{d}}=\frac{i}{neA}\Rightarrow i\propto {{v}_{d}}A\Rightarrow i\propto {{v}_{d}}{{r}^{2}}\]
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