Electrons drift with speed v_d in a conductor with potential difference V across its ends. If V is reduced to (V/2), their drift speed will become:

Electrons drift with speed $\displaystyle \mathrm{v}_{\mathrm{d}}$ in a conductor with potential difference V across its ends. If V is reduced to $\displaystyle \left(\frac{\mathrm{V}}{2}\right)$, their drift speed will become :