Q 12-03-121JEE MainJEE Main 2023 (31 Jan, Shift 1)Easy
The drift velocity of electrons for a conductor connected in an electrical circuit is $V_d$. The conductor is now replaced by another conductor with same material and same length but double the area of cross-section. The applied voltage remains same. The new drift velocity of electrons will be
Answer: (A) $V_d$
$v_d=\dfrac{eE\tau}{m}=\dfrac{eV\tau}{mL}$. It depends on the field $V/L$, not on the area. With the same $V$ and $L$, the drift velocity stays $V_d$.
Solution by Sreeraj P, M.Sc Physics