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(B) The drift velocity $(v_d)$ of electrons in a conductor is given by the relation $v_d = \frac{I}{neA}$,where $I$ is the current,$n$ is the number d

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$10^{-2} \, cm/s$

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(B) The drift velocity $(v_d)$ of electrons in a conductor is given by the relation $v_d = \frac{I}{neA}$,where $I$ is the current,$n$ is the number density of electrons,$e$ is the charge of an electron,and $A$ is the cross-sectional area.For typical metallic conductors,the drift velocity of electrons is very small,typically in the range of $10^{-4} \, m/s$ to $10^{-5} \, m/s$.Converting this to $cm/s$: $10^{-4} \, m/s = 10^{-4} 	imes 10^{2} \, cm/s = 10^{-2} \, cm/s$.Therefore,the order of drift velocity is $10^{-2} \, cm/s$.

When current flows through a conductor,then the order of drift velocity of electrons will be

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