The drift velocity does not depend upon

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(B) The drift velocity $v_d$ is given by the formula $v_d = \frac{I}{neA}$,where $I$ is the current,$n$ is the number density of free electrons,$e$ is

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Length of the wire

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(B) The drift velocity $v_d$ is given by the formula $v_d = \frac{I}{neA}$,where $I$ is the current,$n$ is the number density of free electrons,$e$ is the charge of an electron,and $A$ is the cross-sectional area of the wire.From this relation,it is clear that $v_d$ depends on the current $(I)$,the number density of free electrons $(n)$,and the cross-sectional area $(A)$.However,the drift velocity does not depend on the length of the wire $(L)$ for a macroscopic conductor.Therefore,the correct option is $B$.

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